Journal
INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE
Volume 52, Issue 11, Pages 8042-8046Publisher
ASSOC RESEARCH VISION OPHTHALMOLOGY INC
DOI: 10.1167/iovs.11-8321
Keywords
-
Categories
Funding
- National Institutes of Health [K23EY018356, 5R24AT004641]
Ask authors/readers for more resources
PURPOSE. Reliable outcome measures are needed to estimate changes in peripheral vision during future treatment clinical trials for retinal degeneration patients. The authors examined the short-term variability of Goldmann visual field (GVF) results converted to retinal areas in retinitis pigmentosa (RP) subjects. METHODS. Two within-visit GVFs were obtained from one eye each of 37 RP subjects with visual acuity better than 20/400 by a single experienced operator using the V4e (n = 28) or III4e (n = 12) target, or both. Planimetric GVF measures were digitized and converted to retinal areas in square millimeters by a single independent user. The 95% coefficient of repeatability (CR.(95)) for percentage change in central retinal area was determined from the test-retest difference. RESULTS. There were no significant systematic trends toward either increase or decrease between the first and second GVF. For the III4e target, the CR.(95) was 23.7% on average across all 12 subjects. For the V4e target, the CR.(95) was 32.8% on average across all 28 subjects. However, 3 of 8 subjects with a geometric mean retinal area <10 mm(2) (similar to 7 degrees radius) for the V4e target exhibited unusually large variability (50%-100%), and the CR.(95) was 19.2% when these three subjects were excluded. Variability was not statistically significantly related to visual acuity, age, presence of cystoid macular edema, or subjects' stress or anxiety levels. CONCLUSIONS. Inherent test-retest variability (CR.(95)) of functional retinal areas derived from GVF results in a clinical RP population can be limited to <20% by using a single experienced operator, making the GVF the measure of choice for changes in peripheral vision. (Invest Ophthalmol Vis Sci. 2011;52:8042-8046) DOI:10.1167/iovs.11-8321
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available