Purpose: This work reports long-term outcomes in macular telangiectasia type 2 (MacTel) with subretinal neovascularization (SRNV). Methods: A retrospective, single-center review of medical records was performed on all patients with a diagnosis of MacTel presenting between May 2004 and October 2019. Medical and ocular history, best-corrected visual acuity (BCVA) at baseline and final visit, optical coherence tomography data, and treatment history of SRNV secondary to MacTel were recorded. Results: A total of 471 eyes were diagnosed with MacTel. SRNV was present in 44 eyes (9.3%), of which 38 eyes met inclusion criteria for SRNV. Average follow-up duration in the SRNV group was 78.4 months. All SRNV patients underwent antivascular endothelial growth factor (anti-VEGF) therapy. There was no significant change from mean baseline (0.59 ± 0.45) to final (0.70 ± 0.49) BCVA in the SRNV group as a whole ( P = .13). Subgroup analysis revealed 17 of 38 eyes had SRNV at diagnosis and received immediate anti-VEGF treatment. In this subgroup mean pretreatment BCVA was 0.89 ± 0.43 and the mean final BCVA was 0.87 ± 0.61 ( P = .84). The remainder (21 of 38 eyes) developed SRNV during follow-up. In this subgroup, final BCVA after initiation of treatment was 0.56 ± 0.32, an improvement in BCVA from SRNV onset ( P = .04) and a decrease from pre-SRNV onset baseline BCVA ( P = .008). Conclusions: Visual acuity is maintained, not improved, in long-term follow-up of MacTel with SRNV treated with anti-VEGF. Patients presenting with SRNV have a worse prognosis than those who develop SRNV during follow-up.
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