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The UWCDot colour vision test and low vision
Author(s) -
Hovis Jeffery K.,
Leat Susan J.,
Epp Karen
Publication year - 2003
Publication title -
ophthalmic and physiological optics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.147
H-Index - 66
eISSN - 1475-1313
pISSN - 0275-5408
DOI - 10.1046/j.1475-1313.2003.00098.x
Subject(s) - test (biology) , mistake , optometry , colour vision , visual acuity , normal vision , kappa , vision test , population , artificial intelligence , medicine , computer vision , psychology , audiology , computer science , ophthalmology , mathematics , paleontology , geometry , political science , law , biology , environmental health
Purpose: Previous studies have shown that colour vision defects are common in the low vision population even when properly designed tests are used. However, there are very few clinical tests available that are suitable for this group of patients. One of the more common is the Jumbo D‐15 (JD15). Although this test uses caps more suitable for the reduced acuity, it requires the patient to have some knowledge of colour order and sufficient dexterity to manipulate the caps. We compared the JD15 with the University of Waterloo Colored Dot test (UWCDot), which has neither of these requirements, to determine whether the UWCDot test could be used as a substitute for the JD15. Methods: The colour vision of 40 consecutive low vision patients was evaluated with both tests. Acuities ranged from 6/6 to 6/1600 with a median value of 6/30. Results: All subjects could perform both tests. The κ coefficient of agreement between tests was high at 0.85 when any major crossing was a failure on the JD15 and any mistake was a failure on the UWCDot. Classification of the type of defect was also reasonable when the defect was relatively severe. Conclusions: The UWCDot can be used as a substitute for the JD15 in the low vision clinic. Both tests identify individuals with moderate‐to‐severe deficiencies, but the UWCDot does not require any manual dexterity and it does not require knowledge of colour‐order.