Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/35050
Title: Variation in vernier acuity with age
Authors: Li, RW
Edwards, MH
Brown, B
Issue Date: 2000
Source: Vision research, 2000, v. 40, no. 27, p. 3775-3781
Abstract: Many visual functions deteriorate with increasing age, vernier acuity apparently being an exception. We used an improved experimental protocol to investigate vernier thresholds in subjects in four age groups. Vernier threshold was found to increase with increasing age, and the difference in this, compared with previous findings is probably due to the smaller inter-pixel angle used. Vernier acuities in young subjects in other studies seem to have been underestimated. As vernier acuity did not vary with retinal illuminance and the sensitivity loss does not seem to be a learning effect, neural rather than optical changes are likely to account for the deterioration. Measurement of vernier acuity may have clinical application in the determination of visual function behind cataract, and it will be necessary to consider the effect of age on vernier acuity.
Keywords: Ageing
Vernier acuity
Vernier bias
Hyperacuity
Publisher: Pergamon Press
Journal: Vision research 
ISSN: 0042-6989
DOI: 10.1016/S0042-6989(00)00212-1
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