Comparison of accommodative functions in dominant and non-dominant eye

Abstract

PURPOSE: To compare the accommodative functions involving Accommodative amplitude (AA), accommodative facility (AF) and
accommodative response (AR) of dominant and non-dominant eye.

METHODS: A comparative cross-sectional study was performed at COAVS, KEMU Lahore from September to December 2021 on 71 students to compare the functions of accommodation in dominant and non-dominant eye. Ocular dominance was assessed by DOLMANMETHOD. AA was determined by pushup method by measuring it monocular with help of RAF ruler. AF assessment was done monocular with ±2 flippers. AR was evaluated by MEM retinoscopy.

RESULTS: Mean age was 21.94 ± 2.66 years. Results revealed that the percentage of right eye dominant student was 80.3%, while left
eyewas 19.7%. The sum value(SD) for AF, AA and AR of the dominant eye was11.04cycles per minute,15.15D and 0.80D respectively. The mean value (SD) of AF, AA and AR of non-dominant eye was 10.09 cycles per minute,15.91D and 0.76D respectively. The mean difference in AF, AA and AR of both eyes was0.95cycles per minute,0.76D and 0.04D respectively. This data proved that there was no significant difference among accommodative functions in non-dominant and dominant eye (P>0.05).

CONCLUSION: Accommodationfacility, amplitude of accommodation and lag of accommodation in dominant eye was higher than nondominant eye. However, this differencewas not statistically significant.Hence, it is not an important clinical factor to be considered while determining the effect of ocular dominance on accommodative functions.

KEYWORDS: Dominant eye, Non-dominant eye, Amplitude of accommodation, Accommodation response, Accommodation facility.