Applicability of Worth four dot test in patients with red green color vision defect visiting Mayo Hospital Lahore.

Shumaila Basheer, Muhammad Suhail Sarwar


OBJECTIVES: Primary aim of this study was to identify the validity of worth four dot test (W4DT) in patients with red green (R-G) color vision defect (CVD) to evaluate their binocular sensory status.

METHOD: Forty five individuals with R-G CVD went through W4DT. The type of R-G CVD was determined through D15 Farnsworth color test. W4DT was used to assess binocular sensory dissociation. Results were recorded according to the difference noted in case of amblyopia and squint. Prior approval was sought from ethical review board of College of Ophthalmology and Allied Vision Sciences to conduct this study.

RESULTS: Total number of subjects was 45. Both males and females were included in the study. 25 individuals had protanopia while 18 individuals had deuteranopia and remaining 2 subjects had deuteranomaly. They performed W4DT at near and distance. Twenty out of 25 showed fusion and five had suppression. Among deuteranopia, 16 had fusion while one showed diplopia and remaining one had suppression. Out of 2 individuals one had diplopia and one showed fusion. Result showed that W4DT is significant in red green color vision patients where p=0.02. This result showed that patients with red green color vision defect can successfully perform the W4DT and their sensory status can be checked through this test.

CONCLUSION: It concludes that patients with R-G CVD can effectively perform the W4DT.


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