Journal article
Luminance contrast and colour contrast related errors in pseudoisochromatic plate identification
Eye (London), Vol.11(5), pp.713-716
09/1997
DOI: 10.1038/eye.1997.182
PMID: 9474323
Abstract
Purpose: To determine whether differences in luminance contrast and colour contrast are factors in failing to identify American Optical pseudoisochromatic plates (AOPP).
Methods: We studied two groups of subjects. In 20 normal test subjects with no errors on the AOPP we used cross-polarising filters to darken and then gradually increase perceived luminance of the AOPP until these normal subjects correctly identified the plate. In a second group, to evaluate the relationship between a luminance contrast sensitivity score using Arden plates and AOPP identification, we tested 37 non-colour-deficient subjects who missed zero to five of the AOPP of low colour and luminance contrast (plates 9-12, 15).
Results: Using the cross-polarising filters, we found five plates that required more light to identify (plates 9-12, 15). In the second experiment, we found a significant relationship between the number missed of these five AOPP plates and a decrease in contrast sensitivity (r = 0.91, p < 0.001, Spearman correlation coefficient).
Conclusion: Errors in AOPP colour plate detection may be due to loss of ability to perceive colour contrast and possibly luminance contrast.
Details
- Title: Subtitle
- Luminance contrast and colour contrast related errors in pseudoisochromatic plate identification
- Creators
- Michael Wall - University of IowaPaul B Donzis - Jules Stein Eye Institute
- Resource Type
- Journal article
- Publication Details
- Eye (London), Vol.11(5), pp.713-716
- DOI
- 10.1038/eye.1997.182
- PMID
- 9474323
- ISSN
- 0950-222X
- eISSN
- 1476-5454
- Language
- English
- Date published
- 09/1997
- Academic Unit
- Neurology; Ophthalmology and Visual Sciences
- Record Identifier
- 9984187269402771
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