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Clinical Ophthalmology
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Choroidal thickness after intravitreal ranibizumab injections for choroidal neovascularization
Original Research
(5062) Total Article Views
Authors: Ellabban AA, Tsujikawa A, Ogino K, Ooto S, Yamashiro K, Oishi A, Yoshimura N
Published Date May 2012 Volume 2012:6 Pages 837 - 844
DOI: http://dx.doi.org/10.2147/OPTH.S30907
| Received: | 15 February 2012  |
|---|---|
| Accepted: | 10 March 2012 |
| Published: | 30 May 2012 |
Department of Ophthalmology and Visual Sciences, Kyoto University Graduate School of Medicine, Kyoto, Japan
Purpose: To study changes in choroidal thickness with ranibizumab treatment for choroidal neovascularization (CNV).
Design: Prospective case series.
Methods: This prospective study consisted of 60 CNV-affected eyes of 60 patients treated with intravitreal injections of ranibizumab using an on-demand protocol after an initial loading phase. The eyes studied included 20 with age-related macular degeneration (AMD), 20 with polypoidal choroidal vasculopathy (PCV), and 20 with myopic CNV. In the eyes with AMD and PCV, choroidal thickness at the fovea was measured with optical coherence tomography using enhanced depth imaging. In eyes with myopic CNV, the choroidal thickness was measured using standard optical coherence tomography without the enhanced depth imaging technique.
Results: With ranibizumab treatment, central retinal thickness decreased significantly (P < 0.001) and visual acuity improved significantly (P < 0.001). However, central choroidal thickness (167.2 ± 108.3 µm) showed no significant change at 1 month after the loading phase (165.2 ± 107.8 µm, P = 0.120) or at final examination (164.8 ± 107.7 µm, P = 0.115). At baseline, central retinal thickness in eyes with AMD was significantly greater that those with PCV (P = 0.005) or high myopia (P = 0.029). However, central choroidal thickness in eyes with myopic CNV was significantly thinner than in eyes with AMD (P < 0.001) or PCV (P < 0.001). In each type of disease, there was no significant change in central choroidal thickness with ranibizumab treatment.
Conclusion: The effect of ranibizumab on the choroidal thickness is minimal, if any.
Keywords: choroidal thickness, ranibizumab, optical coherence tomography
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