AIM: To evaluate the effect of red-green duochrome test in subjective refraction.

METHODS: A randomly-selected sample size of 60 new patients with myopia were measured twice using subjective refraction with and without the red-green duochrome test. Assessments on the effectiveness were made based on comprehensive optometry analysis, accommodation response, accommodation sensitivity, positive and negative relative accommodation.

RESULTS: Application of red-green duochrome test on the targeted population did not show any statistical significance to the subjective refraction results. No difference was observed on patients with dilated pupils(P=0.686)and non-dilated pupils(P=0.655). Bland-Altman analysis of displayed good consistency between both subjective refraction measurements on each patient. Multivariate linear regression analysis shows that the results of subjective refraction were independent of age, obliquity, regulation lag, positive relative adjustment, and negative relative adjustment effect(P>0.05).

CONCLUSION: The red-green duochrome test does not affect optometric results.