Joint application of hyperacuity perimetry and gap tests to assess visual function behind cataracts: initial trials.

Mark McIntosh,'s picture
PubMed URL: 
http://www.ncbi.nlm.nih.gov/pubmed/2414084
Author: 
Raphael S
Author List: 
Essock EA
Enoch JM
Williams RA
Barricks M
Raphael S
Journal: 
Doc Ophthalmol
PubMed ID: 
2414084
Pagination: 
293-312
Volume: 
60
Issue: 
3
Abstract: 
We have developed two related clinical tests that offer potential in better assessing visual function behind an ocular opacity. The tests are resistant to the effects of opacities because they utilize a localization task (vernier acuity) rather than a resolution task. In this paper we report the initial trials in which we apply the two tests together. Results from six case studies (some with actual opacities and some with simulated opacities) illustrate both the conduct of the tests and their potential capabilities in detecting even very modest retinal dysfunction in the presence of opacities. These techniques offer considerable potential in the separation of a given acuity loss observed in the presence of cataract into a portion due to the opacity and a portion due to retinal dysfunction.
Published Date: 
September, 1985

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