To report the feasibility of retinal thickness mapping for evaluating thickness differences in retinal areas with and without leakage shown by fluorescein angiography for patients who have age-related macular degeneration with choroidal neovascularization.
A custom-built version of the retinal thickness analyzer was used for thickness mapping. Retinal thickness was defined as the separation between vitreoretinal and pigment epithelium–choroid interfaces. Imaging was performed in 1 eye of 10 patients with the clinical diagnoses of age-related macular degeneration and choroidal neovascularization. Patients either had never undergone photodynamic therapy at the time of measurement (untreated) or had received one or more photodynamic therapy treatments (treated). Average retinal thicknesses in selected areas with and without the presence of leakage shown by fluorescein angiography were calculated and compared statistically.
Retinal thickness (mean ± SD) in areas with leakage (315 ± 54 μm) was significantly greater than that in areas without leakage (280 ± 28 μm) (P = 0.03). In untreated patients, areas with leakage (345 ± 45 μm) were significantly thicker than areas without leakage (289 ± 23 μm) (P = 0.02). In treated patients, retinal thickness in areas with leakage (271 ± 33 μm) and without leakage (267 ± 34 μm) was similar.
Retinal thickness mapping may prove to be useful as an adjunct to fluorescein angiography to monitor choroidal neovascularization and its treatment.
Retinal thickness mapping may prove to be a useful adjunct to fluorescein angiography to monitor choroidal neovascularization and its treatment. The feasibility of retinal thickness mapping for evaluating thickness changes over choroidal neovascular membranes was studied.
From Department of Ophthalmology and Visual Sciences, University of Illinois at Chicago, Chicago, Illinois.
Supported by grants from the US Department of Veterans Affairs (Washington, DC) and the National Eye Institute (Bethesda, MD) and an unrestricted fund from Research to Prevent Blindness (New York, NY).
Presented in part at the Association for Research in Vision and Ophthalmology Meeting; April 25–29, 2004; Fort Lauderdale, FL. The authors have no proprietary interest in this study.
Reprint requests: Mahnaz Shahidi, PhD, Department of Ophthalmology and Visual Sciences, University of Illinois at Chicago, 1855 West Taylor Street, Chicago, IL 60612; e-mail: firstname.lastname@example.org