Abstract: Objective To compare the effect of bifocal lenses, progressive addition lenses and single vision lenses on stereoscopic vision recovery in patients with high AC/A ratio esotropia. Design Prospective study. Participants A total of 57 cases were enrolled, including 18 cases with progressive addition lenses, 23 cases with bifocal lenses, and 16 cases with single vision lenses. Methods All patients in the three groups had full orthoptic correction and were in the orthoptic position when viewing the distance. The additional diopter of progressive addition lenses and bifocal lenses was +2.50~+3.00 D. After 3~5 years’ follow-up, the differences of deviation at distance and near, AC/A ratio and near stereoscopic vision in each group after the treatment were statistically analyzed. Main Outcome Measures Orthotropic rate at near, AC/A ratio, near stereoscopic vision. Results There were no significant differences of the baseline data of age, gender, refractive status, AC/A before treatment among the three groups (all P>0.05), the stereoscopic vision of the three groups was all lost before treatment. After follow-up of 3~5 years, the orthotropic rate at near of the bifocal lenses, progressive addition lenses and single vision lenses groups was 10/23(43%), 10/18(56%), and 6/16(38%), respectively (χ2=0.71，P=0.70). The stereoscopic vision of patients in the three groups was improved to (6.79±1.67) lnArcsec, (7.43±1.50) lnArcsec, and (7.41±1.48) lnArcsec, but there was no statistically significant difference among the three groups (F=1.12, P=0.33). Conclusion Bifocal lenses, progressive addition lenses, and single vision lenses have a similar therapeutic effect on high AC/A ratio esotropia. (Ophthalmol CHN, 2023, 32: 488-491)

Key words: high AC/A ratio esotropia, progressive addition lenses, bifocal lenses, single vision lenses