Ronald P. Danis

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AIM Choroidal perfusion, affected in age related macular degeneration (AMD), is difficult to objectively assess given the overlying retinal circulation. This study more objectively compared choroidal perfusion parameters in a group with non-neovascular AMD to an unaffected age matched control group. METHODS 21 non-neovascular AMD subjects and 21 age(More)
OBJECTIVE Longitudinal evidence linking diabetic retinopathy with changes in brain structure and cognition is sparse. We used data from the Action to Control Cardiovascular Risk in Diabetes (ACCORD) trial to determine whether diabetic retinopathy at baseline predicted changes in brain structure or cognition 40 months later. RESEARCH DESIGN AND METHODS(More)
OBJECTIVE The aim of this study was to examine differences between adolescents and adults in persistence of the benefits of intensive therapy 10 years after completion of the Diabetes Control and Complications Trial (DCCT). RESEARCH DESIGN AND METHODS During the Epidemiology of Diabetes Interventions and Complications (EDIC) study, progression of(More)
OBJECTIVE The authors tested the antiangiogenic properties of an orally administered protein kinase-Cbeta inhibitor, LY333531, in a pig model of preretinal neovascularization caused by retinal branch vein occlusion to determine the effectiveness of this therapy in preventing intraocular neovascularization from an ischemic stimulus. METHODS In 20 eyes of(More)
PURPOSE The purpose of this article was to assess signal quality of retinal optical coherence tomography (OCT) images from multiple devices using subjective and quantitative measurements. METHODS A total of 120 multiframe OCT images from 4 spectral domain OCT devices (Cirrus, RTVue, Spectralis, and 3D OCT-1000) were evaluated subjectively by trained(More)
PURPOSE To analyze brightness, contrast, and color balance of digital versus film retinal images in a multicenter clinical trial, to propose a model image from exemplars, and to optimize both image types for evaluation of age-related macular degeneration (AMD). METHODS The Age-Related Eye Disease Study 2 (AREDS2) is enrolling subjects from 90 clinics,(More)
PURPOSE To compare automated assessment of macular drusen delineated by the authors' originally developed algorithm on three-dimensional (3D) spectral-domain optical coherence tomography (SD-OCT) with the assessment by certified graders on color fundus photographs in nonneovascular age-related macular degeneration (AMD). METHODS Automated assessment of(More)
PURPOSE To compare grading of diabetic retinopathy (DR) and diabetic macular edema (DME) from stereoscopic film versus stereoscopic digital photographs obtained from a subset of Diabetic Retinopathy Clinical Research Network ( participants. METHODS In this photographic media comparison study, digital and film images were obtained at a single(More)
PURPOSE To perform a descriptive analysis of the effects on ocular blood flow of transpupillary thermotherapy (TTT) for occult subfoveal choroidal neovascular membranes (CNVMs) in age-related macular degeneration (AMD). METHODS Eleven subjects with occult subfoveal CNVM due to AMD were assessed in a masked fashion by color Doppler imaging (CDI) within 24(More)
The HRP/trypsin technique is a new histologic method for the light microscopic study of the retinal blood vessels. A two-stage procedure, the first step results in a retinal whole amount preparation which permits visualization of the three-dimensional architecture of perfused vessels and their relationship within the retina. This allows analysis of gross(More)