Effect of Wearing Corrective Glasses for One Month on Binocular Vision in Anisometropic and Isoametropic Patients

Considering the effects of binocular anomalies in patient's daily activities, including those with isoametropia and anisometropia, and as the first option for correcting refractive errors, the present study was conducted to investigate if wearing glasses for a month could make a difference in binocular anomalies in patients with considerable refractive errors.

In the current cross-sectional study, 56 patients aged 8-38 years old (28 patients with anisometropia and 28 patients with isoametropia) who visited our office either for annual check-up or having other eye symptoms were included. Patients included did not have strabismus or microtropia and were examined by an ophthalmologist to check for possible pathologies. Patients’ refraction (objective and subjective) showed an amount of refractive errors that needed glasses or a change in the current eye glasses. Their sensory fusion, stereopsis, Near Point of Accommodation, and accommodative facility were examined exactly after wearing newly prescibed glasses and once more after one month of use. The results were evaluated between groups and then among the groups.

The mean age of the participants was 24.3 (SEM=1.7) for patients with anisometropia and 21 (SEM=1.4) for isoametropic patients. There was no significant statistical difference between anisometropic and isoametropic groups in any of the measured variables both in the first and second examinations (Table 1). Stereopsis and accommodative facility improved significantly in both groups (p<0.05). But there was no significant difference in Near Point of Accommodation (p>0.05).

According to the results of the current study, we observed improvement in stereopsis and accommodation facility in the two groups after using glasses. As a result, after one month of using corrective glasses, in addition to improvement in binocular vision, some symptoms such as blurred vision, headache and ocular fatigue disappeared.