Office-based relaxing incision procedure for correction of astigmatism after deep anterior lamellar keratoplasty
Author(s):
Abstract:
Purpose
To report the outcomes of a simple and effective office‑based procedure for the correction of astigmatism after deep anterior lamellar keratoplasty (DALK).Methods
This study enrolled 24 consecutive keratoconic eyes that developed an intolerable amount of graft astigmatism after DALK. The location and extension of steep semi‑meridians were determined using corneal topography. Office‑based relaxing incision procedures were performed at the slit‑lamp biomicroscope using a 27‑gauge needle. Relaxing incisions were made at the donor‑recipient interface on one side of the steepest meridian with an arc length of 45° to 60° and an initial depth of approximately 7080% of the corneal thickness. Topography was performed after 3040 minutes and the initial incision was enhanced in depth and length. If an acceptable amount of astigmatism was not achieved, another incision was created at the opposite semi‑meridian during the same session.Results
Mean follow‑up period was 13.1 ± 7.4 months. Mean preoperative best spectacle corrected visual acuity was 0.26 ± 0.14 logMAR, increasing to 0.22 ± 0.09 logMAR after the procedure (P = 0.20). Mean spherical equivalent refractive error increased from − 4.64 ± 3.06 diopters (D) preoperatively to −6.06 ± 3.15 D postoperatively (P = 0.01). Mean keratometric astigmatism was reduced by 2.95 ± 3. D and 5.16 ± 2.97 D measured using subtraction and vector analysis methods, respectively (P Conclusion
Office‑based relaxing incision is a safe and effective procedure for the treatment of corneal graft astigmatism after DALK. This approach effectively decreases the need for the more costly alternative in the operating room.Language:
English
Published:
Journal of Ophthalmic and Vision Research, Volume:12 Issue: 2, Apr-Jun 2017
Page:
156
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