Impact of Positive & Negative Lens-Induced Defocus on Contrast-Sensitivity in Myopic & Non-Myopic Adults
试验速览
- 阶段
- 不适用
- 状态
- 进行中（未招募）
- 入组人数
- 36
- 试验地点
- 1
- 主要终点
- Contrast Sensitivity
研究概览
简要总结
examines the influence of lens-induced defocus on contrast sensitivity-a crucial aspect of visual performance.Each participant experiences both positive and negative defocus through different lenses, with measurements taken for contrast sensitivity using the Pelli-Robson chart. Outcomes are evaluated at baseline, 2 weeks, and 4 weeks to understand the effect of defocus over time.
详细描述
Additional data on symptoms like visual fatigue and computer vision syndrome are gathered using the Visual Fatigue Questionnaire (VFQ) and the Computer Vision Syndrome Questionnaire (CVS-Q), respectively. This study's findings could be instrumental in refining optical treatments, offering insights into how defocus impacts visual function across refractive conditions. Results may ultimately benefit optometric practices by guiding lens prescriptions for improved contrast sensitivity and quality of life for myopic and non-myopic individuals alike.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Diagnostic
- 盲法
- None
入排标准
- 年龄范围
- 18 Years 至 50 Years（Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •Adults aged 18 to 50 years.
- •Participants with a confirmed diagnosis of myopia or non-myopia.
- •Best corrected visual acuity of 20/30 or better.
- •No history of ocular surgery or significant ocular disease.
- •Informed consent was obtained.
排除标准
- •Individuals with a history of systemic diseases affecting vision (e.g., diabetes, hypertension).
- •Presence of binocular vision anomalies or strabismus.
- •Pregnant or nursing women.
- •Any current use of medications affecting visual function (e.g., medications causing visual side effects).
研究组 & 干预措施
interventional group
干预措施: Positive Lens-Induced Defocus Using Spectacle Lenses (+2.00 D) for Myopic Participants (Diagnostic Test)
Interventional group II
干预措施: Negative Lens-Induced Defocus Using Spectacle Lenses (-2.00 D) for Myopic Participants (Diagnostic Test)
Interventional group III
干预措施: Positive Lens-Induced Defocus Using Spectacle Lenses (+2.00 D) for Non-Myopic Participants (Combination Product)
Interventional group IV
干预措施: Negative Lens-Induced Defocus Using Spectacle Lenses (-2.00 D) for Non-Myopic Participants (Combination Product)
结局指标
主要结局
Contrast Sensitivity
时间窗: 12 Months
Measured with the Pelli-Robson Contrast Sensitivity Chart, capturing changes in participants' ability to detect low-contrast visual stimuli under defocus conditions.
Visual Fatigue
时间窗: 12 months
Evaluated with the Visual Fatigue Questionnaire (VFQ) and Computer Vision Syndrome assessing symptoms like eye strain, discomfort, and fatigue following lens-induced defocus.
次要结局
未报告次要终点
研究者
Muhammad Naveed Babur
Principal Investigator
Superior University