Impact of Different Illumination Levels on Ocular Parameters in Healthy Adults During Book-Reading: An Experimental Study.

Q3 Medicine

British and Irish Orthoptic Journal Pub Date : 2026-04-01 eCollection Date: 2026-01-01 DOI:10.22599/bioj.529

Vishal Biswas, Roshni Majumder, Supriya Awasthi, Rahul Singh

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Abstract

Aim: To determine the role of different levels of illumination on various binocular vision parameters.

Settings and design: An experimental study was conducted from October 2024-June 2025.

Methods: Thirty-four participants aged between 17 to 25 years with a mean age of 19.7 ± 2.4 years were included. Under different lighting conditions, i.e., low illumination (50 lux), medium illumination (100 lux), and high illumination (150 lux), the participants were instructed to perform reading tasks. The vergence and accommodative parameters for near were evaluated.

Results: Observed changes in binocular vision parameters were associated with varying illumination levels. At 50 lux, the binocular accommodative facility (BAF) was 6.97 ± 0.86 cpm; at 150 lux, it was 10.55 ± 1.04 cpm. Higher illumination significantly enhanced vergence facility (VF), near point of accommodation (NPA), and near point of convergence (NPC). Brighter illumination enhanced both positive and negative fusional vergence (PFV and NFV) values, while MEM retinoscopy demonstrated decrease of accommodative lag.

Conclusions: Binocular vision parameters were higher significantly with high illumination which can enhance visual performance. Proper lighting is essential for eye exams, digital device use, and workspace design.

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不同照度对健康成人阅读时眼参数影响的实验研究

目的：探讨不同光照水平对双目视觉参数的影响。环境与设计：实验研究时间为2024年10月至2025年6月。方法：纳入34例患者，年龄17 ~ 25岁，平均年龄19.7±2.4岁。在低照度（50勒克斯）、中等照度（100勒克斯）和高照度（150勒克斯）的不同照明条件下，指导参与者执行阅读任务。对近似的收敛性和适应性参数进行了评价。结果：观察到双目视觉参数的变化与不同光照水平有关。50勒克斯时，双眼调节系数（BAF）为6.97±0.86 cpm；在150勒克斯时为10.55±1.04 cpm。高照度显著增强了聚光设施（VF）、近调节点（NPA）和近会聚点（NPC）。较亮的光照增强了正、负融合散度（PFV和NFV）值，而MEM视网膜镜显示调节滞后降低。结论：高照度可显著提高双眼视觉参数，增强视觉功能。适当的照明对于眼科检查、数字设备使用和工作空间设计至关重要。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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