title: Optimal area of retinal photocoagulation necessary for suppressing active iris neovascularisation associated with diabetic retinopathy.
abstract: To determine the optimal area of retinal photocoagulation required for suppressing active neovascularisation (NVI) associated with diabetic retinopathy. We studied 1 eye each of 4 patients in whom active NVI was ophthalmoscopically shown to have been suppressed by additional photocoagulation. These patients initially underwent pan-retinal photocoagulation for diabetic retinopathy at another hospital, but NVI developed subsequently. We compared the areas of photocoagulation before and after additional photocoagulation and compared the area of retinal photocoagulation. The photocoagulated areas before and after additional photocoagulation in the four eyes were 20.7 and 45.2, 36.6 and 56.3, 30.4 and 67.4, and 11.7 and 53.4 %, respectively. The area of retinal photocoagulation required to suppress active NVI is calculated to be ~50 %.
authors.affiliation: Department of Ophthalmology, Graduate School of Medicine, University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan.
authors.forename: Tomoyasu
authors.initials: T
authors.lastname: Shiraya
authors.forename: Satoshi
authors.initials: S
authors.lastname: Kato
authors.forename: Takashi
authors.initials: T
authors.lastname: Shigeeda
mesh_terms: D003930:Diabetic Retinopathy / Q000150:complications*; D005260:Female; D006801:Humans; D007498:Iris / Q000098:blood supply*; D007499:Iris Diseases / Q000601:surgery*; D008028:Light Coagulation / Q000379:methods*; D008297:Male; D008875:Middle Aged; D009389:Neovascularization, Pathologic / Q000601:surgery*; D012189:Retrospective Studies; D016896:Treatment Outcome