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R. Tano, M. Sakamoto, M. Ikeda, S. Sugita, H. Fujii, T. Mano, T. Maeno; Analysis of Retinal Blood Flow by Laser Speckle Flowgraphy in a Case With Central Retinal Vein Occlusion After Radial Optic Neurotomy. Invest. Ophthalmol. Vis. Sci. 2008;49(13):4274.
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© ARVO (1962-2015); The Authors (2016-present)
To analyze the increase of retinal blood flow with laser speckle flowgraphy (LSFG) in a case with central retinal vein occlusion (CRVO) after radial optic neurotomy (RON).
A 72-year old male was referred to our clinic with a diagnosis of impending CRVO, OS. Best corrected decimal visual acuity (BCVA) was 1.0, OS. Despite the administration of anti-coagulant, BCVA decreased to 0.4 and macular edema deteriorated. The patient underwent a pars plana vitrectomy with RON OS, with assessments by fluorescein angiography (FAG) and optical coherence tomography (OCT) before and after the operation. LSFG was also performed to assess the square blur rate (SBR), i.e., the relative value of the blood flow velocity.
Macular edema disappeared at 1 month postoperatively on OCT. An anastomosis appeared by the optic disc at site of the RON at 2 months postoperatively, and was confirmed by indirect ophthalmoscopy and FAG. Macular edema disappeared and BCVA improved to 1.0, OS. The SBR of the upper nasal vein and lower temporal vein increased by 31.6% and 32.1%, respectively, at 2 months postoperatively compared to that at 10 days postoperatively (before the anastomosis was obtained).
LSFG might be an effective technique to assess the increase of retinal blood flow quantitatively after RON in CRVO.
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