Effects of Wearing a New Progressive Addition Lens on Working Distance and Refractive Status in Adult Chinese Computer Users
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 64
- 主要终点
- Change in refractive status measured by an automatic refractometer
研究概览
简要总结
With the increasing reliance on tablet computers and smartphones in daily life, it is important to determine whether and how the prolonged usage of these handheld digital devices influences the working habits and refractive status. This study aimed to determine the effects of wearing conventional single-vision lenses vs. new progressive addition lenses on the working distance and refractive status while playing interactive video game in Chinese pre-presbyopic adult computer users.
详细描述
Chinese adult computer users were recruited from two age cohorts. They were prescribed, in random order, with conventional single-vision lenses and progressive addition lenses designed for handheld digital display devices (iPad). Basic ocular parameters were measured through a comprehensive eye examination at the baseline visit. Working distance and refractive shift were measured immediately after delivering the lenses and after one month of lens wear. Working distance were recorded with an automatic ultrasound sensor while the participants were playing a 30-minute video game. Refractive-error shift before and after playing the video game were measured with an open-field autorefractor in both eyes and averaged.
研究设计
- 研究类型
- Interventional
- 分配方式
- Na
- 干预模型
- Single Group
- 主要目的
- Basic Science
- 盲法
- None
入排标准
- 年龄范围
- 18 Years 至 40 Years（Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •Hong Kong Chinese
- •Computer users (computer usage >2hours/day)
- •Spherical-equivalent refractive errors between plano and -9.00D and cylindrical power ≤2.50D
排除标准
- •Anyone with visual acuity worse than 0 logMAR, anisometropia more than 2.00D, abnormal accommodative function, wearing rigid contact lens, and a history of ocular surgery and pathology
结局指标
主要结局
Change in refractive status measured by an automatic refractometer
时间窗: Change in refractive status shift after one month of lens wear
Refractive status was measured before and after the participant played a 30-minute computer games using an iPad tablet computer. The refractive status shift (post-task refractive status minus pre-task refractive status) was calculated for each 30-minute game play immediately after the lens delivery and one-month after the lens wear. Absolute and relative changes in the refractive shirt were analyzed and compared between two lens designs.
Change in near working distance measured by an automatic ultrasound sensor
时间窗: Change in near working distance after one month of lens wear
Near working distances were measured continuously over a 30-minute interval while the participant was playing computer games using an iPad tablet computer. The mode of the accumulative working distances was analyzed for each 30-minute interval collected immediately after the lens delivery and one-month after the lens wear. Absolute and relative changes in the working distances were analyzed and compared between two lens designs.
次要结局
未报告次要终点