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Objective To study changes in choroidal thickness(CT) with intravitreal injections of ranibizumab treatment. Methods This is a prospective, uncontrolled, open-label study. A total of 31 eyes of 31 patients diagnosed with wet age-related macular degeneration (AMD) and 33 eyes of 33 patients diagnosed with choroidal neovascularization (CNV) secondary to pathological myopia (PM) were included in the study. All affected eyes were treated with intravitreal ranibizumab 0.05 ml (10 mg/ml) and followed up monthly until 6 months. Enhanced depth imaging on Cirrus spectral-domain optical coherence tomography was used to measure the CT. The initial CT was compared with the data at 1, 3 and 6 month after treatment, and the correlation between of the decrease of CT at the 6 month and the number of injection times was analyzed. Results In AMD group, the average CT respectively decreased by (9.68±11.02), (12.58±11.04), (13.84±11.67)μm at 1, 3 and 6 month, and the differences were significant(t=4.89, 6.34, 6.60;P < 0.001). In PM group, the average CT respectively decreased by (2.06±10.92), (3.64±8.78), (3.27±7.20)μm at 1, 3 and 6 month. The difference at 1 month was not significant (t=1.08, P=0.287). While after 3 months and 6 months, the differences were significant(t=2.38, 2.61;P=0.024, 0.014). The injection times were not correlated with the CT decreases at 6 month in both groups(r=0.04, 0.30;P=0.815, 0.099). Conclusion Intravitreal injections of ranibizumab can induce choroidal thickness reduction for wet age-related macular degeneration and choroidal neovascularization secondary to pathologic myopia.

Citation: QiHang, ChenChangzheng, YizuoHuizi. Choroidal thickness after intravitreal ranibizumab injections for choroidal neovascularization. Chinese Journal of Ocular Fundus Diseases, 2015, 31(1): 31-35. doi: 10.3760/cma.j.issn.1005-1015.2015.01.009 Copy

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