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S. Ishiko, A. Yoshida, T. Nagaoka, Y. Kato, H. Kagokawa, A. Takamiya, M. Kawai, K. Fukui, F. Van de Velde; Evaluation of the Retinal Vessels in Branch Retinal Vein Occlusion Using Scanning Laser Ophthalmoscopy. Invest. Ophthalmol. Vis. Sci. 2009;50(13):5278.
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© ARVO (1962-2015); The Authors (2016-present)
To determine the usefulness of a noninvasive evaluation of the retinal vessels in branch retinal vein occlusion (BRVO) using scanning laser ophthalmoscopy (SLO).
Fundus examination, fluorescein angiography (FA), and noninvasive SLO monochromatic imaging were performed. SLO findings were observed using a digital ophthalmoscope (F-10, Nidek, Japan) equipped with a confocal aperture and two wavelengths blue laser (490 nm) and green laser (532 nm).
Retinal vessels, microaneurysms, and hemorrhages were observed clearly with high contrast using the green laser, which was superior to the fundus color photograph. In acute BRVO, the occluded vessels were visibly enhanced as bright white and had a thicker diameter using the blue laser, although the vessel still appeared red and thinner in the color photograph. Peripheral vessels that were visibly enhanced as bright white using the blue laser were observed around the area of nonperfusion by FA. Occluded vessels were seen as a white line in chronic BRVO, which was the same as the visualized vessels using the blue laser in the acute phase.
Using the confocal aperture and the shorter wavelength lasers in the SLO, we clearly and noninvasively observed morphologically enhanced changes in normal and damaged vessels. Because this method provides information about damaged vessels, it would be valuable for evaluating BRVO.
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