فهرست مطالب

Current Ophthalmology - Volume:33 Issue: 4, Oct-Dec 2021

Journal of Current Ophthalmology
Volume:33 Issue: 4, Oct-Dec 2021

  • تاریخ انتشار: 1400/10/20
  • تعداد عناوین: 22
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  • Leila Ghiasian, Bijan Samavat, Yasaman Hadi, Mona Arbab, Navid Abolfathzadeh* Pages 367-378
    Purpose

    To summarize the recent evidence regarding different aspects of pterygium recurrence.

    Methods

    Human‑based studies from PubMed, Scopus, and Google Scholar were identified using the following keywords: conjunctival disease, pterygium, recurrent pterygium, pterygium recurrence, pterygium management/surgery, conjunctival autograft (CAU), amniotic membrane graft/transplant, and adjuvant therapy (January 2009 to February 2021). We reviewed risk factors associated with the recurrence of pterygium, timing of recurrence, medical treatments to prevent from recurrence, and nonsurgical and surgical alternatives for management of recurrence.

    Results

    Dry eye disease, black race, and young age are considered definite risk factors for recurrence. However, fleshy appearance of the pterygium and preoperative size remain controversial. Surgical techniques such as excessive suturing, insufficient conjunctival graft size, thick conjunctival graft with remained Tenon tissue, and postoperative graft retraction are considered possible risk factors for recurrence. Using fibrin glue instead of sutures can further reduce recurrence rates. Although recurrence could occur even after many years, most recurrences happen in the first 3–6 months after surgery. Multiple kinds of adjuvant medications are used before, during, or after the operation including mitomycin C (MMC), 5‑fluorouracil (5‑FU), corticosteroids, and anti‑vascular endothelial growth factors(anti‑VEGFs). Multiple weekly subconjunctival 5‑FU injections are shown to be safe and effective in halting the progression of recurrent pterygium. Although topical bevacizumab is found to inhibit the growth of impending recurrent pterygium, the effect is mostly temporary. CAU is superior to amniotic membrane transplantation in the treatment for recurrent pterygia.

    Conclusions

    There is yet to be a panacea in treating recurrent pterygium. Currently, there is not a globally accepted recommendation for treating recurrent pterygium with anti‑VEGFs or 5‑FU as a nonsurgical treatment. We strongly recommend using MMC as an adjunct to surgery in recurrent cases, with consideration of its specific complications. CAU is the most effective surgical treatment for recurrent pterygium, and other new surgical therapies need further investigation.

    Keywords: Adjuvant therapy, Amniotic membrane graft, transplant, Conjunctival autograft, Conjunctival disease, Pterygium, Pterygiummanagement, Pterygium recurrence, Recurrent pterygium, Risk factor
  • Mohamad Reza Akbari, Masoud Khorrami‑Nejad*, Haleh Kangari, Alireza Akbarzadeh Baghban, Mehdi Ranjbar Pazouki Pages 379-387
    Purpose

    To provide a comprehensive review on different characteristics of abnormal head postures (AHPs) due to different ocular causes, its measurement, and its effect on facial appearance.

    Methods

    In this review article, PubMed, Scopus, and Google Scholar search engines were searched for the scientific articles and books published between 1975 and September 2020 based on the keywords of this article. The selected articles were collected, summarized, classified, evaluated, and finally concluded.

    Results

    AHP can be caused by various ocular or nonocular diseases. The prevalence of ocular causes of AHP was reported to be 18%–25%. 1.1% of patients presenting to ophthalmology clinics has AHP. The first step in evaluating a patient with AHP is a correct differential diagnosis between nonocular and ocular sources by performing comprehensive eye examinations and ruling out other causes of orthopedic and neurological AHP. Ocular AHP occurs for a variety of reasons, the most important of which include nystagmus, superior oblique palsy, and Duane’s retraction syndrome. AHP may be an essential clinical sign for an underlying disease, which can only be appropriately treated by the accurate determination of the cause. Long‑standing AHP may lead to facial asymmetry and secondary muscular and skeletal changes.

    Conclusion

    In conclusion, a proper differential diagnosis between nonocular and ocular causes, knowledge of the different forms of AHP and their measurement methods, accurate diagnosis of the cause, and proper and timely treatment of ocular AHP can prevent facial asymmetry and secondary muscular and skeletal changes in the patients.

    Keywords: Abnormal head posture, Duane’s retraction syndrome, Facial asymmetry, Nystagmus, Superior oblique pals, Torticollis
  • Naveed Nilforushan, Acieh Es’haghi*, Samira Jafari, Parya Abdolalizadeh, Arezoo Miraftabi, Samira Chaibakhsh, Mohsen Bahmani Kashkouli Pages 388-393
    Purpose

    To investigate the frequency of persistent postoperative ptosis (PP) following trabeculectomy or Ahmed glaucoma valve (AGV) implantation and to analyze the associated factors.

    Methods

    It is a prospective observational study on glaucoma patients who underwent trabeculectomy or AGV implantation from October 2015 to June 2017 in a tertiary center. Margin reflex distance 1 and 2 (MRD1 and 2) and levator function were measured before and at least 6 months, postoperatively. Clinically significant ptosis was defined as ≥2 mm drop of MRD1.

    Results

    One hundred and fourteen patients (124 eyelids) including 76 patients (87 eyelids) with trabeculectomy and 35 patients (37 eyelids) with AGV implantation were included. The mean age was 55.50 (standard deviation = 17.54) years. Most of the surgeries were performed under general anesthesia (87.9%, 109/124) between 30 and 60 min (53.2%, 66/124) by residents (39.5%, 49/124). Trabeculectomy and AGV groups did not differ in terms of pre, intra, and postoperative variables (0.1≤ P ≤0.9) except duration of surgery (P = 0.01) and sex (P = 0.04). Clinically significant persistent PP was observed in 12.9% (16/124) in total, 13.7% (12/87) in the trabeculectomy group, and 10.8% (4/37) in the AGV group (P = 0.6). Male gender (ß coefficient = 2.56, 95% confidence interval (CI) = 4.76–0.36, P = 0.02) and a higher preoperative MRD1 (ß coefficient = 1.24, 95% CI = 0.52–1.95, P = 0.001) were the only factors affecting the frequency of clinically significant PP.

    Conclusions

    Postoperative blepharoptosis occurred in 12.9% of eyes after glaucoma procedures. Male gender and higher preoperative MRD1 were significantly associated with a higher frequency of postglaucoma surgery blepharoptosis.

    Keywords: Ahmed glaucoma valve, Glaucoma, Postoperative blepharoptosis, Trabeculectomy
  • Farideh Sharifipour*, Mohammad Malekahmadi, Mehdi Azimi, Bahman Cheraghian Pages 394-399
    Purpose

    To evaluate intraocular pressure (IOP) and corneal biomechanical changes after water‑drinking test (WDT) in glaucomatous and normal eyes using Ocular Response Analyzer (ORA).

    Methods

    This prospective study included 30 medically controlled, 30 surgically treated glaucoma patients and 30 normal individuals. Baseline measurements included central corneal thickness (CCT), ORA‑derived corneal hysteresis (CH), corneal resistance factor (CRF), corneal‑compensated IOP (IOPcc), and Goldmann‑correlated IOP (IOPg). Measurements were repeated 15, 30, and 60 min after drinking 1000 mL of water. Changes in ORA parameters were compared among the groups.

    Results

    All groups showed a significant increase in IOPg and IOPcc at all test points. Peak IOP occurred at 15 min and decreased gradually over time but did not reach the baseline values at 60 min. The surgery group had significantly lower baseline IOPg and IOPcc (10.7 ± 3.1 and 12.8 ± 3.7 mmHg, P = 0.001 and 0.01), lower peak IOPg and IOPcc (14.4 ± 4.6 and 16.2 ± 4.6 mmHg, P = 0.003 and 0.034), and lower percent IOPg and IOPcc fluctuations (13 ± 5.6 and 15 ± 5.9, P = 0.0001 and 0.002), respectively, compared to the medical group. Baseline CH and its fluctuations were not significantly different among the groups. CH decreased to a trough corresponding to peak IOPcc. There was a significant negative correlation between IOPcc and CH (r = −0.609, P < 0.001). The medical group showed more CRF fluctuations compared to normal group.(P = 0.039).

    Conclusion

    Surgically treated glaucomatous eyes show less IOP fluctuations and lower peak IOP after WDT compared to medically controlled and normal eyes.

    Keywords: Glaucoma, Intraocular pressure, Ocular Response Analyzer, Water‑drinking test
  • Nazanin Binayi Faal, Habib Ojaghi*, Saeid Sadeghieh Ahari Pages 400-407
    Purpose

    To evaluate the effect of opposite clear corneal incisions (OCCI) with 4 mm incisions on the steep meridian on postoperative astigmatism.

    Methods

    This study was performed on 64 eyes of 55 patients with keratometric astigmatism of ≥ 1 diopter (D) undergoing phacoemulsification. Patients were divided into two groups, with‑the‑rule (WTR) astigmatism and against‑the‑rule (ATR) astigmatism. Initial incisions in the WTR group were performed on the temporal side with 3.2 mm keratome and paired stab incisions were performed on the steep meridian. At the end of the surgery, stab incisions were enlarged to 4 mm. Follow‑up visits were scheduled at 1, 3, 6, and 12 months postoperatively, which included refraction and keratometry.

    Results

    It was found that the mean preoperative keratometric astigmatism was 2.06 ± 0.86 D. The postoperative mean keratometric astigmatism was 1.3 ± 0.7 D after 1 month and 1.2 ± 0.7 D after 12 months. The mean astigmatism correction between the preoperative measure and that taken at 1 month was statistically significant (P = 0.001), but there was no significant change in the severity of astigmatism afterward. The mean surgically‑induced astigmatism was found to be 1.99 ± 0.9 D. The 12‑month changes of mean absolute astigmatism were: 1.06 ± 0.7 D in the WTR group, and 0.53 ± 0.7 D in the ATR group. The difference between the two groups was statistically significant (P = 0.02).

    Conclusion

    Based on our findings, we posit that paired OCCI on the steep axis, using 4 mm incisions is an effective technique to correct preoperative astigmatism.

    Keywords: Astigmatism, Cataract, Opposite clear corneal incisions, Phacoemulsification
  • Dhouha Gouider*, Asma Khallouli, Afef Maalej, Sana Khochtali, Moncef Khairallah Pages 408-412
    Purpose

    To describe, through anterior segment optical coherence tomography (AS‑OCT) images, the different phases of epidemic keratoconjunctivitis (EKC) and show the impact of topical steroid on the course of this disease.

    Methods

    A prospective observational study included 38 eyes(28 patients) with a presumed EKC complicated by subepithelial infiltrates(SEIs) and treated with topical fluorometholone. Slit‑lamp examinations and serial AS‑OCT were performed on days 7, 14, 30, 90, 180, and 210. The thickness of the whole cornea and thickness of the corneal epithelium were measured with AS‑OCT and correlated to the clinical findings on slit‑lamp examination in the different EKC phases.

    Results

    In all patients, on day 7, the AS‑OCT showed hyperreflective dots that were limited to the epithelial layers of the cornea and slightly rising above the epithelial surface, corresponding to the confluence of the punctuations of punctate epithelial keratitis. On day 14, a hyperreflective line in the Bowman’s layer with intact epithelium was noted. On day 30, this hyperreflective band extended rapidly toward the anterior stroma, becoming thicker and more intense, corresponding to the SEI. They gradually decreased in number, intensity, and extent following treatment by topical steroids in 71.4% of the cases. Only two patients had persistent SEI. They were refractory to 3‑month treatment by steroids. In these patients, who had persistent SEI, AS‑OCT showed that the hyperreflective areas became well‑defined, plaque‑like lesions with sharp margins associated with disruption of Bowman’s layer, localized epithelial thickening, stromal thinning, and a decrease in pachymetry.

    Conclusion

    AS‑OCT can be a valuable tool that provides a range of characteristic patterns of EKC and helps in monitoring it

    Keywords: Adenovirus, Anterior segment optical coherence tomography, Corticosteroids, Hyperreflective, Subepithelial infiltrates
  • Fereshteh Birjandi, Hadi Ostadimoghaddam, Abbasali Yekta, Monireh Mahjoob* Pages 413-416
    Purpose

    To simplify the fitting process, this study was designed to predict the initial power of contact lenses using the regression model based on manual Javal keratometry data and refractive errors.

    Methods

    In this retrospective study, 121 eyes of 69 patients with keratoconus(KCN) were fitted with a specific trial set of rigid gas permeable contact lenses based on the standard criterion of “three‑point touch” over a 7‑year period. Power of the cornea was measured using Javal keratometer. Refractive errors and over refraction of patients were diagnosed using Topcon autorefractometer (RM‑A2000) and confirmed by Heine beta 2000 retinoscope.

    Results

    The results of multiple linear regression showed the following equation: power of contact lens = −14.368 (constant of the final multiple regression model), +0.475 (spherical refraction), and +0.275 (flatter corneal power).

    Conclusions

    The results of this study revealed that lens power has a significant relationship with the power of the flat corneal meridian and spherical refractive error in KCN patients. The obtained regression model can be used to shorten patients’ chair time and optometric examination for predicting the power of contact lens.

    Keywords: Javal keratometry, Keratoconus, Rigid gas permeable contact lens
  • Seyed Javad Hashemian, Acieh Es’haghi, Parya Abdolalizadeh*, Leila Ghiasian, Hossein Aghaei, Mohammad Ebrahim Jafari, Mahsa Sadat Hashemian, Seyed Mahyar Hashemian Pages 417-421
    Purpose

    To assess the long‑term visual and refractive stability and ocular biometric changes in low to moderate myopic subjects treated by laser‑assisted subepithelial keratomileusis (LASEK).

    Methods

    It is a prospective, interventional study. Included were 70 eyes of 35 patients who underwent LASEK for correction of ≤6 diopters (D) myopia. The uncorrected and corrected distance visual acuity (UDVA and CDVA), manifest refractions, and ocular biometric indices (by Lenstar‑LS900, Haag‑Streit AG, Koeniz, Switzerland) including keratometry, anterior chamber depth (ACD), aqueous depth (AD), axial length (AL), central corneal thickness (CCT), and lens thickness (LT) were assessed preoperatively and after 6 months and 8 years.

    Results

    Mean preoperative spherical equivalent was −3.99 (standard deviation [SD] =1.38) D which improved to 0.02 (SD = 0.27, P < 0.001) D and −0.10 (SD = 0.31, P < 0.001) D at 6 months and 8 years, respectively. The preoperative AL was not different from postoperative measures at 6 months (P = 0.15) and 8 years (P = 0.47). The ACD and AD decreased during 8 years, while LT increased (all P ≤ 0.001). The changes of LT inversely correlated with changes of ACD (rs = −0.67, P = 0.001 at 6 months and rs = −0.87, P < 0.001 at 8 years) and AD (rs = −0.76, P < 0.001 at 6 months and rs = −0.86, P < 0.001 at 8 years). The CCT and keratometry values reduced at 6 months postoperatively (all P < 0.001) and then did not change up to 8 years (0.21 ≤ P ≤ 0.87).

    Conclusions

    The post‑LASEK myopic regression is 0.1 D over 8 years. Ocular biometric values like keratometry, CCT, ACD, AD, and LT have been changed for a long period after LASEK in low to moderate myopia except AL.

    Keywords: Biometry, Laser‑assisted subepithelial keratomileusis, Lenstar, Low myopia, Optical biometry
  • Amani E. Badawi* Pages 422-430
    Purpose

    To evaluate postoperative corneal haze and corneal densitometry following three different corneal cross-linking (CXL) protocols; standard, accelerated, and trans‑epithelial (TE).

    Methods

    The study recruited 104 eyes (53 patients) with progressive keratoconus divided into three groups: Group I were subjected to standard CXL, Group II to TE‑CXL, and Group III to accelerated CXL (A‑CXL) (10 mW/cm2 for 9 min). Subjective and objective corneal haze measures were evaluated before and 3, 6, and 12 months post‑CXL using slit‑lamp biomicroscopy and Pentacam Sheimpflug camera.

    Results

    There was a significant difference in corneal densitometry between the three groups at 3 and 6 months post‑CXL (P < 0.0001). By the 12th month, a significant statistical difference was observed only in zones (0–2 mm) and (2–6 mm) in both the anterior and the central layers. In Group I, the densitometry value of the preoperative anterior stromal layer (anterior 120 μm) was 19.42 ± 1.81. Then, it peaked at 23.12 ± 1.21 at 3 months (P < 0.0001), reached 19.82 ± 1.19 at 6 months (P = 0.007), and decreased to 19.33 ± 3.23 (P ˃ 0.05) at 12 months. In Group II, the preoperative densitometry value of the anterior layer was 19.41 ± 1.21, peaked at 19.72 ± 1.12 at 3 months (P = 0.02), reached 19.04 ± 1.18 at 6 months (P = 0.052), and increased to 19.13 ± 1.37 at 12 months (P = 0.84). In Group III, the preoperative densitometry value of the anterior stromal layer was 19.53 ± 2.23. Then, it peaked at 24.80 ± 1.08 at 3 months (P < 0.0001), decreased to 21.75 ± 1.11 at 6 months (P < 0.0001), and reached 19.77 ± 2.26 at 12 months (P = 0.047). There was no significant correlation between the visual acuity changes and the total corneal densitometry.

    Conclusion

    The TE‑CXL group showed a better and earlier recovery from the haze, while the A‑CXL group showed a delay in recovering and persistent increased corneal densitometry, mainly in the anterior 120 µ.

    Keywords: Accelerated, Corneal Haze, Cross‑linking, Densitometry, Keratoconus
  • Ali Makateb, Amin Nabavi*, Mahsa Naghash Tabrizi, Hesam Hashemian, Keyvan Shirzadi Pages 431-436
    Purpose

    To evaluate the psychometric properties of the Persian version of quality of life impact of refractive correction (QIRC) questionnaire and its utility in assessment of refractive error‑related quality of life (QoL) following photorefractive keratectomy (PRK).

    Methods

    Patients with low‑to‑moderate myopia (−0.75 to − 6.0) were enrolled in this study. Standard alcohol‑assisted PRK was performed in all patients. The QIRC questionnaire was translated into a Persian version using the standard method. Patients completed QIRC questionnaire preoperatively and 3‑month postoperatively. A group of patients completed the questionnaire twice preoperatively. Psychometric properties were evaluated by internal consistency (Cronbach’s α), item‑total correlation, and known group construct validity. Intraclass correlation coefficient (ICC) were used to examine the repeatability.

    Results

    One hundred forty‑seven patients(60 males and 87 females) with a mean age of 26.3 ± 5.5 (range, 18–39) years were enrolled. Cronbach’s α for total score was 0.923. Item‑total correlation was above 0.3 for all items. ICC was 0.978 for total score. Preoperatively, predominantly contact lens wearers showed significantly better total QIRC score than predominantly spectacle wearers (P = 0.017), which showed good known group validity. Total QIRC score significantly increased from 41.31 ± 6.69 preoperatively to 50.47 ± 7.26 postoperatively (P < 0.0001). Improvement in total QIRC score was observed both in contact lens wearers and spectacle wearers.

    Conclusion

    The Persian version of QIRC questionnaire is a valid and reliable tool. Refractive error‑related QoL assess by QIRC was significantly improved after PRK in an Iranian population.

    Keywords: Photorefractive keratectomy, Quality of life, Refractive surgery, Validation
  • Ahmet Elbeyli*, Bengi Ece Kurtul Pages 437-443
    Purpose

    To investigate the influence of topical cyclopentolate 1%, as an anti‑muscarinic mydriatic agent, on the peripapillary and macular microvasculature by optical coherence tomography angiography (OCT‑A) in healthy adults.

    Methods

    A total of 41 healthy adults without any systemic or ocular disease were enrolled for this prospective consecutive study. All patients underwent OCT‑A measurements (OptoVue Inc., Freemont, CA, USA) to assess optic disc status for radial peripapillary capillary network (whole image, inside disc, and peripapillary capillary densities), and superficial and deep capillary plexus whole, foveal, parafoveal and perifoveal densities, and foveal avascular zone (FAZ) densities. Foveal retinal thicknesses and all quadrant retinal fiber layer thicknesses were also assessed. The 4.5 mm × 4.5 mm peripapillary and 6 mm × 6 mm macular OCT‑A images were undertaken before and 30 min after instillation of topical cyclopentolate 1% to the right eyes.

    Results

    The mean age of subjects was 38.14 ± 14.10 years. All macular, optic disc, and FAZ densities, foveal retinal thicknesses, average, and all quadrant retinal fiber layer thicknesses were statistically similar between baseline and after administration of topical cyclopentolate 1% (P > 0.05).

    Conclusion

    The current study demonstrated that pupillary dilation with topical cyclopentolate 1% seems to have no statistical effect on macular and peripapillary OCT‑A measurements of healthy adults.

    Keywords: Macula, Optic disc, Optical coherence tomography angiography, Retina, Topical cyclopentolate
  • Tarannum Mansoori*, Gandrapu Poojitha Mohan, Satish Gooty Agraharam, Nagalla Balakrishna, Veerandranath Pesala Pages 444-448
    Purpose

    To determine the incidence and risk factors for intraocular pressure (IOP) rise after the scleral buckle (SB) procedure for retinal detachment (RD).

    Methods

    A retrospective chart review of the medical records of patients, who underwent RD repair by SB performed by a single surgeon and had a minimum follow‑up of 6 months was carried out. The outcome measures were the incidence of IOP rise in the operated eyes and the associated risk factors.

    Results

    Fifty‑two eyes of 52 patients with a median postsurgical follow‑up of 18 months(interquartile range: 6, 36, range: 6–60 months) were included. Seven eyes had encircling buckle, 23 eyes had encircling buckle and 1 quadrant segmental buckle, and 22 eyes had encircling buckle and 2 quadrant segmental buckle. IOP rise was seen in 15/52 eyes (28.85%), within 1 month of the SB surgery. Nine out of 15 eyes (60%) of patients <40 years of age had a rise in IOP as compared to 6/37 eyes (16.2%) of patients >40 years of age (P = 0.002). Patients <40 years had a significant increased risk of developing IOP rise, compared to those above 40 years of age (adjusted odds ratio: 7.246 with 95% confidence interval of 1.641–31.986, P = 0.009). None of the fellow eyes had a rise in IOP during the follow‑up period. None of the operated eyes with raised IOP progressed to glaucoma.

    Conclusions

    Elevated IOP is a common complication after the SB procedure, and age <40 years is associated with a greater risk of development of increase in the IOP. Hence, IOP monitoring after the SB surgery is of paramount importance to detect early rise during follow‑up.

    Keywords: Glaucoma, Intraocular Pressure, Retinal Detachment, Scleral Buckle
  • Mohsen Farvardin, Seyed Esmaeil Mousavi, Kamran Zare, Somaye Bazdar, Zahra Farvardin, Mohammad karim Johari* Pages 449-452
    Purpose

    To investigate possible links between thyroid dysfunction and prevalence of wet age‑related macular degeneration (AMD).

    Methods

    The present case–control study enrolled a total number of 90 patients with wet AMD and 90 sex‑, and age‑matched controls through a convenient sequential sampling method. Thyroid hormones were profiled in serum assay. Statistical measures were done to compare means between groups.

    Results

    Our findings showed a significant difference in free T4 levels between wet AMD and control groups (P = 0.002), but the mean values of total T3 and Thyroid‑stimulating hormone levels were similar between the two groups. In addition, there were no differences in serum lipid profile between groups. Although no significant difference in the history of hypertension and hyperlipidemia between wet AMD and control groups was found, the history of smoking was higher in controls (P = 0.039).

    Conclusion

    Thyroid hormone abnormalities may be associated with wet AMD.

    Keywords: Age‑related macular degeneration, Dyslipidemia, Thyroid dysfunction
  • Meriem Ouederni*, Mohamed Ben Hadj Khalifa, Hela Sassi, Fehmy Nefaa, Oumaima Ayed, Monia Cheour Pages 453-460
    Purpose

    To analyze the macular microvascular network and the correlations between visual acuity and quantitative parameters using optical coherence tomography angiography (OCTA) in eyes with retinal vein occlusion (RVO).

    Methods

    We conducted a prospective cross‑sectional study including patients with unilateral RVO. We performed 4.5 mm × 4.5 mm macular OCTA angiograms for assessment of quantitative parameters in both superficial and deep capillary plexuses(SCP, DCP). Area of foveal avascular zone (FAZ), vascular density (VD), skeleton density (SD), fractal dimension (FD), vessel diameter index (VDI), and lacunarity (LAC) were analyzed.

    Results

    Seventy eyes of 35 patients were enrolled. As compared to fellow eyes, OCTA analysis in eyes with RVO showed larger FAZ, lower VD, lower SD, lower FD, higher VDI, and increased LAC in both plexuses (All P < 0.05). The enlargement of FAZ in the SCP was associated with visual loss (P = 0.025, r = 0.378). In the DCP, visual acuity was negatively correlated with parafoveal VD, SD, and FD (P = 0.004, r = −0.472; P = 0.003, r = −0.482 and P = 0.036, r = −0.308, respectively). Stepwise multivariate regression analysis showed that lower SD and lower FD in the DCP remained correlated with poorer visual acuity (P = 0.04, r = −0.261 and P = 0.032, r = −0.264, respectively).

    Conclusions

    OCTA provides quantitative parameters to analyze retinal microvasculature in eyes with RVO. These OCTA biomarkers could be used to predict the impact of macular ischemia and capillary dropout on visual acuity in RVO.

    Keywords: Microvascular network, Optical coherence tomography angiography, Retinal vein occlusion, Vascular density
  • Alexei N. Kulikov*, Dmitrii S. Maltsev, Maria A. Burnasheva, Jay Chhablani Pages 461-467
    Purpose

    To study the potential of dark‑field scanning laser ophthalmoscopy (DF‑SLO) for the prediction of central serous chorioretinopathy (CSC) responsiveness to laser therapy.

    Methods

    Fifty‑two eyes of 52 patients (44 males and 8 females, mean age of 45.4 ± 8.8 years) newly diagnosed with CSC were included in this prospective cohort study. At baseline, all patients received multimodal imaging including DF‑SLO and then were observed until resolution of subretinal fluid or, in nonresolving cases, treated with laser therapy. At the end of the follow‑up, each case was categorized as either self‑resolving, resolving after laser treatment, or nonresolving after laser treatment. Presence of granular retinal pigment epithelium (RPE) changes and lucency of RPE/choroid complex at the leak on DF‑SLO images were used by two masked graders to identify cases nonresolving after laser treatment.

    Results

    Using DF‑SLO images, the masked grader correctly classified 45 of 52 (86.5%) CSC cases. Kappa value for the classification by two graders was 0.95 (95% confidential interval [CI] 0.85–1.0). The area under the receiver operating curve, sensitivity, and specificity of DF‑SLO in identifying nonresolving after laser treatment cases were 0.92 (95% CI: 0.79–0.98), 86.7% (95% CI: 59.5%–98.3%), and 96.6% (95% CI: 82.2%–99.2%), respectively.

    Conclusion

    DF‑SLO may be a useful technique in prognostication of response to laser treatment in newly diagnosed CSC.

    Keywords: Central serous chorioretinopathy, Laser photocoagulation, Micropulse laser therapy, Microsecond pulsing laser, Scanning laserophthalmoscopy
  • Fariba Ghassemi, Shima Dehghani*, Raziyeh Mahmoudzadeh, Alireza Khodabandeh, Hossein Ghanaati, Gholamreza Termehchi Pages 468-474
    Purpose

    To report our 5‑year experience in treating retinoblastoma (RB) with intra‑arterial chemotherapy (IAC) as a primary or secondary therapy, without adjuvant intravitreal chemotherapy.

    Methods

    A retrospective study was conducted on 70 eyes with intraocular RB that were treated with primary or secondary IAC from December 2010‑2015. Demographic characteristics, clinical features, tumor control, and treatment complications were compared and reported.

    Results

    Thirty-seven eyes had received IAC as a secondary therapy after failed/incomplete response to systemic chemotherapy, and 33 eyes had received IAC as a primary treatment. The mean age of patients was 25 ± 8.9 months, and the patients were followed for a mean of 24.5 ± 16.26 months. Overall, enucleation rates were significantly higher in advanced tumors (Group D and E) in both groups (both P < 0.05). The main reason for enucleation in this study group was being unresponsive to treatment (27.4%), with 76% of latter patients having vitreous seeds at the time of enucleation. Enucleation rates did not differ significantly between patients receiving primary (18/33, 54%) or secondary IAC (18/37, 48%) (P = 0.06). In addition, recurrence and complication rates did not differ significantly between eyes receiving IAC as their primary or secondary treatment (P > 0.05).

    Conclusion

    In primary and secondary treatment of RB with IAC, the main findings that are globe salvage, recurrence, and complication rates were comparable when no adjuvant intravitreal chemotherapy was used.

    Keywords: Intra‑arterial chemotherapy, Retinoblastoma, Systemic chemotherapy
  • Zhale Rajavi, Hamideh Sabbaghi*, Narges Behradfar, Mehdi Yaseri, Kourosh Sheibani Pages 475-480
    Purpose

    To determine the clinical characteristics and surgical outcomes of medial rectus(MR) advancement with or without lateral rectus (LR) recession in patients with consecutive exotropia.

    Methods

    This interventional case series was performed on patients with consecutive exotropia of more than 15 prism diopters (PD) at least 6 months after the esotropia surgery. All patients were operated using either unilateral or bilateral MR muscle advancement with or without simultaneous LR recession. Ocular deviation at far and near distances, adduction limitation, and exoshift were investigated at the follow‑ups of 1 week, as well as 1, 3, and 6 months after the surgery. Operation was considered successful when the postoperative far deviation was <10 PD.

    Results

    Thirty patients were evaluated. The mean amount of MR advancement was 5.69 ± 1.33 mm with the mean dose response of 4.7 ± 3.3 and 4.55 ± 4.01 PD at 3 and 6‑month follow‑ups, respectively. Success rate was reduced from 93% at week 1 to 73% at month 6 due to postoperative exodrift, especially during the first 3 months. Preoperative exotropia was the only contributing factor in our study.

    Conclusions

    MR advancement was an effective surgical method for consecutive exotropia correction, especially in cases with MR underaction. Bilateral MR advancement and/or LR recession are suggested in cases with higher preoperative exodeviation. The presence of postoperative exodrift indicates longer follow‑ups for patients.

    Keywords: Advancement, Consecutive exotropia, Medial rectus muscle
  • Bahram Eshraghi, Mansooreh Jamshidian Tehrani*, Fereshteh Tayebi, Bita Momenaei Pages 481-484
    Purpose

    To evaluate the role of monocanalicular intubation (MCI) in congenital nasolacrimal duct obstruction (CNLDO) in children older than 5 years of age.

    Methods

    A retrospective case series study was done on children over 5 years of age diagnosed with CNLDO who underwent MCI. Success rates were evaluated subjectively by asking their parents about persistent symptoms and objectively using the dye disappearance test in clinical examination.

    Results

    A total of 43 eyes of 37 patients with a mean age of 7.42 ± 2.33 (range, 5–15 years of age) were included. The success rate was 60.46%, and the rate of secondary surgical intervention was 25% of all cases (61.11% of failed cases).

    Conclusion

    Primary MCI maintains a reasonable success rate in incomplete complicated CNLDO regardless of age.

    Keywords: Age over 5 years old, Congenital nasolacrimal duct obstruction, Crawford intubation, Monocanalicular intubation
  • Zahra Ashena, Mayank A. Nanavaty*, Ahmed S. Bardan, Riddhi Thaker, Lucia Bascaran Pages 485-491
    Purpose

    To describe a case where prophylactic use of nonsteroidal anti‑inflammatory drugs (NSAID) eye drops lead to recurrent corneal melt with loss of vision and a brief literature review.

    Methods

    This is a case report of an 84‑year‑old diabetic female with chronic dry eye, operated by two different surgeons on each eye at different time intervals. She received topical NSAID prophylaxis after the second surgery only, which led to blindness due to recurrent corneal melt and chronic choroidal effusions. We also present a brief literature review.

    Results

    This lady presented with corneal melt and perforation 5 days following the use of topical NSAIDs prophylaxis after a routine cataract surgery in the second eye. Unfortunately, all efforts to save her vision and eye were unsuccessful as she developed repeated complications in spite of corneal gluing, amniotic membrane, penetrating keratoplasty, and tarsorrhaphy. She also had chronic choroidal effusions. She ended up with an opaque cornea and a subtotal tarsorrhaphy, with no other option to improve her vision as she did not qualify for sedation or general anesthesia due to her poor systemic health.

    Conclusion

    Although it is a common practice for diabetic patients to have topical NSAIDs prophylaxis in combination with steroid eye drops to reduce the risk of cystoid macular edema after cataract surgery, the elderly diabetic patients with concomitant dry eyes should be considered high risk for corneal melt and should be closely monitored. This case highlights the rare but serious complication of topical NSAIDs prophylaxis in the vulnerable cornea, which warrants careful consideration.

    Keywords: Cataract surgery, Corneal melt, Dry eyes, Nonsteroidal anti‑inflammatory drugs, Phacoemulsification
  • Cagri Ilhan*, Mehmet Citirik Pages 492-495
    Purpose

    To report the closure of a recalcitrant macular hole (MH) following the development of choroidal neovascularization.

    Methods

    A 67‑year‑old female patient in this case report was diagnosed with a MH and operated twice, but anatomical closure of MH could not be achieved. The patient was followed up without further treatment, as she rejected any additional procedure.

    Results

    Six months later, a lesion consistent with choroidal neovascularization appeared in the central macula, and the recalcitrant MH closed spontaneously. The MH defect remained closed in the following years.

    Conclusion

    Besides being a new example of the presence of choroidal neovascularization after MH surgery, the most important aspect of this case report is to report the closure of a recalcitrant MH following the development of choroidal neovascularization.

    Keywords: Choroidal neovascularization, Macular hole, Vitrectomy
  • Carlos Cuadros Sánchez*, Beatriz de Luis Eguileor, Cristina Sacristán Egüén, Ana Arce Soto, Nerea Martínez Alday Pages 496-498
    Purpose

    To report a case of macular edema and an epiretinal membrane in an isolated astrocytic hamartoma treated surgically.

    Methods

    Case report.

    Results

    We describe the case of a 37‑year‑old woman whose first symptoms were blurred vision and metamorphopsia. Optical coherence tomography revealed macular edema together with an epiretinal membrane secondary to an isolated retinal astrocytic hamartoma. We performed a pars plana vitrectomy (PPV) with membrane peeling. Both visual and structural outcomes were satisfactory. Complete resolution of symptoms was obtained, and visual acuity was preserved after a 7‑month follow‑up.

    Conclusion

    Although rare, epiretinal membrane may be present in isolated retinal astrocytic hamartomas, PPV and epiretinal membrane peeling may be a good treatment option in glial tumors with macular edema associated with an epiretinal membrane.

    Keywords: Epiretinal membrane, Macular edema, Pars plana vitrectomy, Retinal astrocytic hamartoma
  • Abbas Bagheri*, Ehsan Abbasnia, Alireza Abrishami, Mozhgan Rezaie Kanavi Pages 499-501
    Purpose

    To report a rare case of orbital angioleiomyoma (ALM) and its management.

    Methods

    A 22‑year‑old woman presented with slowly progressive painless axial proptosis. Computed tomography and magnetic resonance imaging demonstrated a well‑defined intraconal mass that was isointense in T1 and hyperintense in T2 weighted images, heterogeneously enhanced by gadolinium.

    Results

    The tumor, despite having significant adhesions to surrounding tissues and noticeable hemorrhage, was excised completely via the lateral orbitotomy approach. Histopathologic analysis of the specimen was consistent with an orbital ALM. The patient recovered from the operation uneventfully.

    Conclusion

    ALM must be considered in the differential diagnoses of orbital tumors

    Keywords: Angioleiomyoma, Axial proptosis, Orbital tumor, Smooth muscle, Vascular tumor