Impact of Different Illumination Levels on Ocular Accommodation in Healthy Adults During Paper-based Reading: An Experimental Study
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 发起方
- 入组人数
- 34
- 试验地点
- 1
- 主要终点
- This study will evaluate how different lighting levels affect ocular accommodation during paper-based reading. Accommodation amplitude, lag, and facility will be measured using autorefractors or dynamic retinoscopy, while visual fatigue symptoms like eye strain, headache, and discomfort will be assessed through questionnaires. The goal is to identify optimal lighting to improve accommodation efficiency and visual comfort in healthy adults.
研究概览
简要总结
This experimental study aims to evaluate the impact of different illumination levels on ocular accommodation during paper-based reading in healthy adults. Participants will undergo reading tasks under varying light intensities while assessing changes in accommodative response, visual fatigue, and reading performance. Primary outcomes include accommodative amplitude, lag, and facility, while secondary outcomes focus on reading speed, comprehension, pupil dynamics, and subjective discomfort. Measurements will be taken before, during, and after reading, with short-term recovery assessments. Findings will help determine optimal lighting conditions to minimize visual strain and enhance reading efficiency, contributing to improved environmental lighting recommendations.
研究设计
- 研究类型
- Observational
入排标准
- 年龄范围
- 17.00 Year(s) 至 24.00 Year(s)（—）
- 性别
- All
入选标准
- •University adults aged 17-24 years
- •Aided visual acuity 20/20 for both near and distance
- •Normal binocular vision parameters.
排除标准
- •Presence of ocular diseases or conditions affecting accommodation & dry eye
- •History of ocular surgery
- •Current use of medications affecting ocular function
- •Not willing to participate
- •Contact lens wearer.
结局指标
主要结局
This study will evaluate how different lighting levels affect ocular accommodation during paper-based reading. Accommodation amplitude, lag, and facility will be measured using autorefractors or dynamic retinoscopy, while visual fatigue symptoms like eye strain, headache, and discomfort will be assessed through questionnaires. The goal is to identify optimal lighting to improve accommodation efficiency and visual comfort in healthy adults.
时间窗: Base line- 1 week
次要结局
- The secondary outcome of this study will focus on additional visual & reading performance parameters influenced by different illumination levels. These include reading speed & comprehension, assessed through standardized reading tests, as well as subjective visual comfort, measured via validated questionnaires. Additionally, pupil diameter changes & blink rate may be recorded to analyze physiological responses to lighting variations. The study will also evaluate the persistence of visual fatigue over time by tracking accommodative recovery post-reading. These outcomes will provide a broader understanding of how lighting impacts overall visual efficiency & reading performance in healthy adults.(1. Base line- 1 week)