Glaucoma progression index (GPI) changes after cataract extraction according to glaucoma severity and lens opacity type

Poster Details

First Author: S.Kim SOUTH KOREA

Co Author(s):                  

Abstract Details

Purpose:

To determine the effect of cataract opacity type and glaucoma severity on global visual field (VF) indices and the glaucoma progression index (GPI)

Setting:

Retrospective, case series.

Methods:

A total of 134 eyes of 134 patients were analyzed. Cataract opacity was classified as cortical, nuclear sclerotic, and posterior subcapsular opacity. The patients underwent phacoemulsification cataract extraction surgery. Postoperatively, VF was taken within 10 months. Glaucoma severity was classified by the postoperative mean deviation (MD) value. Changes in MD, pattern standard deviation (PSD), and GPI value before and after surgery were compared according to cataract opacity and glaucoma severity.

Results:

The mean age at cataract surgery was 75 ± 8 years. VF indices and GPI were less influenced by nuclear sclerotic cataract opacity. In patients with early glaucoma (MD>-6), especially with cortical cataract opacity, VF global indices were improved after cataract extraction (P<0.05). Cataract opacity could make the interpretation more difficult in early glaucoma. GPI was a reliable index that was less affected before and after cataract extraction except in early glaucoma (MD>-6) with cortical opacity.

Conclusions:

Not only existing cataract opacity but also cataract opacity type may affect the results of VF. Therefore, in the interpretation of VF results, glaucoma severity and cataract opacity type should be taken into consideration. FINANCIAL DISCLOSURE?: No