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Posters

Time course of changes in aniseikonia and visual function following vitrectomy for epiretinal membrane

Poster Details

First Author: F.Okamoto JAPAN

Co Author(s):    Y. Sugiura   Y. Okamoto   T. Oshika            0   0 0   0 0   0 0   0 0

Abstract Details



Purpose:

To quantify aniseikonia in patients undergoing vitrectomy for epiretinal membrane (ERM), and to investigate the relationship between aniseikonia and visual function.

Setting:

This study included 44 eyes of 44 patients with idiopathic ERM.

Methods:

We examined visual acuity, aniseikonia with the New Aniseikonia Test, metamorphopsia with M-CHARTS and central retinal thickness (CFT) with spectral-domain optical coherence tomography before and 3and 6 months after surgery.

Results:

Preoperative aniseikonia was 6.2% ± 4.5% [range -1% ~ +19.5%]. Of the 44 patients, 39 (89%) had macropsia, 1 (2%) had micropsia, and 4 (9%) had no aniseikonia. Aniseikonia at 3 months postoperatively was 6.2% ± 4.5% [range -2.5% ~ +19.0%] and at 6 months postoperatively was 6.5% ± 4.3% [range -1.5% ~ +17.0%]. Vitrectomy significantly improved visual acuity and metamorphopsia, but did not change aniseikonia. Postoperative aniseikonia had a significant correlation with preoperative aniseikonia (r = 0.728, p < 0.0001). Pre- and postoperative aniseikonia showed significantly correlation with pre- and postoperative metamorphopsia respectively, however, aniseikonia was not associated with visual acuity. At 6 months postoperatively, aniseikonia significantly correlated with CFT.

Conclusions:

Most of the ERM patients had macropsia, which did not improve by surgery. Aniseikonia was associated with metamorphopsia.

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