Purpose: To assess the 1-year functional outcome and to evaluate the morphological changes after intravitreal injections of ranibizumab in eyes affected with retinal angiomatous proliferation (RAP) due to age-related macular degeneration (AMD).
Methods: A prospective, non-randomized, interventional study was conducted on 26 consecutive patients with newly diagnosed RAP. All eyes were treatment naive and were randomized to receive intravitreal injections of ranibizumab for a 12-month period. After the first three monthly injections, re-treatment was performed in case of best-corrected visual acuity (BCVA) loss of at least five letters associated with fluid within the macula, central macular thickness (CMT) increase of at least 100 microm, and/or persistence of fluid within the macula as evaluated by optical coherence tomography, new onset macular haemorrhages, persistence of leakage from the lesions on fluorescein angiography.
Results: All patients completed the 12-month follow-up: 25 of the 29 treated eyes (86.2%) were stabilized, with a loss of less than 15 letters. Nineteen eyes (65.5%) maintained or improved their BCVA, and three eyes (10.3%) gained three lines or more. Overall, mean BCVA remained stable at the 12-month follow-up (-0.07 letters; P>0.05). Mean CMT significantly decreased from 386+/-147 to 216+/-74 microm at the 12-month follow-up. No significant adverse events were observed during the study. The mean number of injections was 5.8+/-1.7 during the follow-up period.
Conclusion: The 1-year follow-up outcomes in our series suggest that ranibizumab is an effective treatment for RAP in AMD, allowing stabilization of BCVA and reduction of CMT.