1. Distinguishing wet from dry age-related macular degeneration using three-dimensional computer-automated threshold Amsler grid testing
- Author
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Simon R. Bababeygy, Jerry Sebag, R. V. Jivrajka, Wolfgang Fink, Craig D. Robison, and Alfredo A. Sadun
- Subjects
Male ,medicine.medical_specialty ,genetic structures ,Vision Disorders ,Visual Acuity ,Sensitivity and Specificity ,Contrast Sensitivity ,Cellular and Molecular Neuroscience ,Imaging, Three-Dimensional ,Disease severity ,Predictive Value of Tests ,Geographic Atrophy ,Ophthalmology ,medicine ,Humans ,False Positive Reactions ,Central visual field ,Diagnosis, Computer-Assisted ,Fluorescein Angiography ,Dry age-related macular degeneration ,Aged ,Amsler grid ,business.industry ,Extramural ,Outcome measures ,Reproducibility of Results ,Macular degeneration ,medicine.disease ,Predictive value ,eye diseases ,Sensory Systems ,Cross-Sectional Studies ,Wet Macular Degeneration ,Visual Field Tests ,Optometry ,Female ,sense organs ,Visual Fields ,business - Abstract
Background/aims: With the increased efficacy of current therapy for wet age-related macular degeneration (AMD), better ways to detect wet AMD are needed. This study was designed to test the ability of three-dimensional contrast threshold Amsler grid (3D-CTAG) testing to distinguish wet AMD from dry AMD. Methods: Conventional paper Amsler grid and 3D-CTAG tests were performed in 90 eyes: 63 with AMD (34 dry, 29 wet) and 27 controls. Qualitative comparisons were based upon the three-dimensional shapes of central visual field (VF) defects. Quantitative analyses considered the number and volume of the three-dimensional defects. Results: 25/34 (74%) dry AMD and 6/29 (21%) wet AMD eyes had no distortions on paper Amsler grid. Of these, 5/25 (20%) dry and 6/6 (100%) wet (p=0.03) AMD eyes exhibited central VF defects with 3D-CTAG. Wet AMD displayed stepped defects in 16/28 (57%) eyes, compared with only 2/34 (6%) of dry AMD eyes (p=0.002). All three volumetric indices of VF defects were two- to four-fold greater in wet than dry AMD (p
- Published
- 2011
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