Abstract
To investigate fellow eyes of newly diagnosed unilateral exudative Type 3 (T3) macular neovascularization (MNV) patients by assessing the presence and progression of a preclinical neovascular component during a 3-year follow-up. This is a longitudinal study involving three retinal referral centers. Patients affected by unilateral exudative treatment-naive T3 MNV were enrolled. Twenty-four eyes of 24 patients (79 ± 6 years old) were enrolled. Nine eyes (37%) displayed a nonexudative T3 MNV at baseline that developed exudation after a mean of 9 ± 9 months. Fifteen eyes that did not display a nonexudative Type 3 MNV at baseline. Five eyes (21%) did not display neovessels at baseline, but showed a nonexudative T3 after 13 ± 9 months, and exudation after 8 ± 3 months. Five eyes (21%) developed active exudative T3 MNV after 23 ± 9 months, with no detectable nonexudative stage at baseline. Five eyes (21%) did not show MNV, but progressed to geographic atrophy by 36 months of follow-up. Overall, T3 MNV in the fellow eye accounted for 79%, all developing exudation over 3 years of follow-up. The occurrence of a nonexudative T3 MNV is a frequent event in the fellow eye of patients newly diagnosed with unilateral exudative T3 MNV and it precedes the development of exudation over 3 years (prevalence of 37% and cumulative incidence of 79%). Optical coherence tomography angiography approach may be used to perform an early diagnosis and treatment of patients with T3 MNV.
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