The Effect of the Free-toroidal Design Lenses on the Subjective Visual Quality in the Myopic Population
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 200
- 试验地点
- 1
- 主要终点
- The clarity score
研究概览
简要总结
A prospective, self-control, double-blind design was conducted in Tianjin. Two hundred participants were assigned to wear two kinds of spectacle glasses. To examine the effect of free-toroidal design and aspherical lens on the subjective visual quality among the myopic population.
详细描述
A prospective, self-control, double-blind design was conducted in Tianjin. Two hundred participants were assigned to wear two kinds of spectacle glasses. To examine the effect of free-toroidal design and aspherical lens on the subjective visual quality among the myopic population. The subjective visual quality of clarity and comfort were determined using a questionnaire when first wearing the glasses and after 1week.
研究设计
- 研究类型
- Observational
- 观察模型
- Other
- 时间视角
- Prospective
入排标准
- 年龄范围
- 18 Years 至 50 Years（Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •health volunteers
- •their spherical refraction from -0.50 to -8.00 Diopter, with the cylinder diopter less than -3.00 Diopter
- •best corrected visual acuity (BCVA)≥ 20/20 in both eyes
- •stable refraction (no change greater than 0.5 Diopter within two years)
排除标准
- •if they had Aphakic or intraocular lens eyes, had a history of trauma, active eye disease or ocular surgery, serious systemic diseases, or had a wearing history of corneal contact lenses.
结局指标
主要结局
The clarity score
时间窗: baseline visit time
The clarity score by a questionnaire,scores on the questionnaire range from 1 to 6, with higher scores being better
The comfort score
时间窗: baseline visit time
The comfort score by a questionnaire,scores on the questionnaire range from 1 to 6, with higher scores being better
次要结局
- Accuracy of foveal and peripheral visual acuity(baseline visit time)