相关实验视频
Updated: Jul 2, 2025

05:36
Subjective Refraction Test Using a Smartphone for Vision Screening
Published on: October 18, 2024
677
在健康的年轻成年人中,主观与客观折射
Yuval Kozlov1,2, Michael Kinori3,4, Sharon Armarnik5
1Department of Military Medicine, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel.
BMC ophthalmology
|February 20, 2024
概括
年轻成年人的客观和主观折射显示出差异,参与者更喜欢对近视和远视偏差进行更少的校正. 与自折射测量相比,老年人喜欢更少的直觉纠正.
科学领域:
- 眼科医生 眼科 眼科
- 视光学测量 视光学测量 视光学测量
- 视觉科学科学 视觉科学
背景情况:
- 折射误差评估对于视力校正至关重要.
- 自律折射器提供客观的测量,而主观折射精确了处方.
- 了解客观和主观折射之间的差异对于精确的眼睛护理至关重要.
研究的目的:
- 为了比较客观和主观的折射测量在健康的年轻人.
- 分析自折和主观折射之间的球体等价值 (SE),气功率 (Cp) 和形轴的差异.
- 为了确定近视,高视和老年参与者的折射偏好模式.
主要方法:
- 对1395名接受常规眼科检查的年轻成年人的回顾性分析.
- 自动折射器 (客观) 和眼科医生 (主观) 的折射数据的比较.
- 将结果转换为功率向量 (SE,J0,J45) 并计算气功率 (Cp).
主要成果:
- 在SE (p=0.001) 和Cp (p<0.001) 中,客观和主观折射之间发现了显著的差异.
- 年轻的超视的参与者更喜欢更少的加权,而近视的参与者更喜欢更少的减权.
- 年龄较大的参与者和整体队列在主观折射中更喜欢更少的气功率 (Cp).
结论:
- 主观折射揭示了年轻成年人对近视和超视的低校正倾向.
- 与客观测量相比,参与者,特别是老年人,更喜欢减少纹纠正.
- 在客观和主观方法之间,对形轴的测量是一致的.
相关概念视频
Focusing of Light in the Eye
2.8K
Light rays enter the eye through the cornea, a transparent dome-shaped tissue that is the eye's outermost layer. The cornea bends or refracts, light rays traveling to the pupil. The shape of the cornea determines how much of the light is bent and whether the image will be focused correctly on the retina at the back of the eye. Once the light has passed through both refraction layers, it converges into a single focal point onto a small area. This is where photoreceptors start transforming...
2.8K
Influence of Earth's Curvature and Atmospheric Refraction on Leveling
95
During leveling, the Earth's curvature and atmospheric refraction introduce deviations in the line of sight from a true horizontal reference. When the line of sight is leveled, it remains perpendicular to the plumb line only at a single point. Beyond this, it deviates due to the Earth’s curvature, represented by the correction C. For a sight distance D, the deviation can be derived using the relationship:This relationship shows that the deviation increases quadratically with distance.
95

