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Title: Inner nuclear layer cystoid spaces are a poor prognostic factor in typical age-related macular degeneration and polypoidal choroidal vasculopathy.
Author: Kang EC, Choi S, Koh HJ.
Journal: Graefes Arch Clin Exp Ophthalmol; 2017 Nov; 255(11):2157-2163. PubMed ID: 28819823.
Abstract:
PURPOSE: To investigate predictive factors for changes in best-corrected visual acuity (BCVA) at 24 months after intravitreal ranibizumab (IVR) for neovascular age-related macular degeneration (nAMD). METHODS: This retrospective study included 55 eyes of 55 consecutive patients (32 men and 23 women) with nAMD who received three consecutive monthly IVR injections and were re-treated as needed over a 24-month period. We used the mean changes in logarithm of the minimal angle of resolution (logMAR) BCVA at 24 months as the dependent variable in regression analysis. RESULTS: The presence of intraretinal cystoid spaces in the inner nuclear layer (INLc, P = 0.004) and baseline subfoveal choroidal thickness (SFCT, P = 0.013) predicted BCVA changes from baseline to 24 months. The presence of INLc and thinning of SFCT were associated with decreased BCVA at 24 months. Thirty-five eyes without INLc showed improved logMAR BCVA, from 0.550 ± 0.273 to 0.368 ± 0.274 (P = 0.045); however, 20 eyes with INLc showed decreased logMAR BCVA, from 0.708 ± 0.347 to 0.971 ± 0.523 (P < 0.001) through the 24-month follow-up. The mean number of IVR injections during the follow-up period was 8.74 ± 4.76 in eyes without INLc and 10.63 ± 4.72 in eyes with INLc, without a statistically significant difference (P = 0.144). CONCLUSION: Eyes with INLc or thinned SFCT showed worse visual outcomes compared with eyes without the INLc or with thick SFCT. Furthermore, eyes without INLc showed improved BCVA; however, eyes with INLc showed decreased BCVA with an as-needed regimen.

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