Fasler, K; Moraes, G; Fu, DJ; Wagner, S; Gokhale, E; Kortuem, K; Chopra, R; ... Keane, P; + view all Fasler, K; Moraes, G; Fu, DJ; Wagner, S; Gokhale, E; Kortuem, K; Chopra, R; Faes, L; Preston, G; Pontikos, N; Patel, P; Tufail, A; Lee, A; Balaskas, K; Keane, P; - view fewer (2019) The Moorfields AMD Database Report 2 - Fellow Eye Involvement with Neovascular Age-related Macular Degeneration. BioRxiv: Cold Spring Harbor, NY, USA.

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Abstract

BACKGROUND/AIMS: Neovascular age-related macular degeneration (nAMD) is frequently bilateral, and previous reports on ‘fellow eyes’’ have assumed sequential treatment after a period of treatment of the first eye only. The aim of our study was to analyse baseline characteristics and visual acuity (VA) outcomes of fellow eye involvement with nAMD, specifically differentiating between sequential and non-sequential (due to macular scarring in the first eye) anti-vascular endothelial growth factor treatment and timelines for fellow eye involvement. METHODS: Retrospective, electronic medical record database study of the Moorfields AMD database of 8174 eyes/120,756 single entries with data extracted between October 21, 2008 and August 9, 2018. The dataset for analysis consisted of 1180 sequential, 413 nonsequential, and 1110 unilateral eyes. RESULTS: Mean VA of sequentially treated fellow eyes at baseline was significantly higher (62±13), VA gain over two years lower (0.65±14), and proportion of eyes with good VA (≥20/40 or 70 letters) higher (46%) than the respective first eyes (baseline VA 54±16, VA gain at two years 5.6±15, percentage of eyes with good VA 38%). Non-sequential fellow eyes showed baseline characteristics and VA outcomes similar to first eyes. Fellow eye involvement rate was 32% at two years, and median time interval to fellow eye involvement was 71 (IQR 27-147) weeks. CONCLUSION: This reports shows sequentially treated nAMD fellow eyes have better baseline and final VA than non-sequentially treated eyes after 2 years of treatment. Sequentially treated eyes also had a greater proportion with good VA after 2 years of treatment. PRECIS Depending on age, fellow eye involvement occurs in 32% of patients with neovascular AMD by two years. Fellow eyes generally maintain better vision, except in cases where late-stage disease in the first eye was untreated.

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