INTERPUPILLARY DISTANCE AS A DETERMINANT OF ACCOMMODATIVE EFFICIENCY AND BINOCULAR VISUAL SYMPTOMS IN YOUNG ADULTS

Abstract

Background/Objective: The study aimed to examine and analyse how interpupillary distance (IPD) influences accommodative parameters and in co-relation to symptomatic binocular vision in adults

Method: A cross sectional study was performed involving 50 symptomatic patients of both gender aged 10-40 years. Optically corrected and non strabismic patients were selected from Guwahati, Assam between year 2025-2026. IPD and other accommodative parameters were examined. Statistical analysis was conducted using SPSS.

Results: IPD demonstrated a significant inverse relationship with CISS score, suggesting that larger interpupillary distances were associated with fewer visual symptoms. The strongest association was identified between PRA and CISS score, indicating that reduced accommodative reserve contributes substantially to visual discomfort. Approximately 18.4% of symptom variability could be explained by PRA measurements.

Conclusion: Positive relative accommodation PRA and CISS scores showed the highest association, with PRA explaining 18.4% of symptom variability. These findings suggest that visual discomfort is significantly influenced by decreased accommodative reserve as measured by PRA.