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Motion-Acuity Test for Visual Field Acuity Measurement with Motion-Defined Shapes
Published on: February 23, 2024
The effect of decreased visual acuity on clinical color vision testing
Timothy J McCulley1, Karl C Golnik, Byron L Lam
1Stanford University School of Medicine, Department of Ophthalmology, 900 Blake Wilbur Drive, Room W-3074, Stanford, CA 94305, USA. mcculley@stanford.edu
Purpose:
Evaluate the effect of visual acuity on color vision testing.
Design:
University based clinical experimental study.
Methods:
Right eyes of 12 healthy subjects were fogged with plus lenses to logMAR 1.88 and assessed with D-15 panel, Ishihara, and Hardy-Rand-Rittler (HRR) plates. Subjects were tested at lesser degrees of fogging, 0.1 logMAR intervals. The acuity at which 5% of the population tests abnormally was estimated as follows. The average acuity at which a 10% reduction in correct responses occurred was determined. From this, two standard deviations were subtracted. Examination devices were compared using repeated measures analysis of variance.
Results:
Color vision testing did not significantly differ from baseline up to logMAR 1.40 (D-15 panel), 1.10 (HRR plates), and 0.72 (Ishihara plates). Testing devices were significantly different (P < .005).
Conclusions:
Color vision testing is accurate up to logMAR 1.40 (20/501) with D-15 panel, 1.10 (20/252) with HRR plates, and 0.72 (20/106) with Ishihara plates.
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