单焦眼内眼镜的外围失焦
Ramya Natarajan1, Bianca Maceo Heilman, Arthur Ho
1From the Ophthalmic Biophysics Laboratory, L V Prasad Eye Institute, Hyderabad, Telangana, India (Natarajan, Singh, Mohamed, Vadavalli); Ophthalmic Biophysics Center, Bascom Palmer Eye Institute, University of Miami, Miller School of Medicine, Miami, Florida (Heilman, Ruggeri, Parel, Manns); Department of Biomedical Engineering, University of Miami College of Engineering, Coral Gables, Florida (Heilman, Ruggeri, Parel, Manns); Brien Holden Vision Institute Limited, Sydney, New South Wales, Australia; School of Optometry and Vision Science, The University of New South Wales, Sydney, New South Wales, Australia (Ho); Cataract & Refractive surgery services, L V Prasad Eye Institute, Hyderabad, Telangana, India (Singh, Reddy, Vadavalli); The Shantilal Shanghvi Cornea Institute, L V Prasad Eye Institute, Hyderabad, Telangana, India (Vadavalli).
单焦眼内透镜 (IOL) 具有显著的角度依赖性,导致外围失焦,随着IOL功率和角度的增加而增加. 这会影响手术后的视觉形状,尤其是在替换了天然晶状透镜后.
科学领域:
- 眼科医生 眼科 眼科
- 光学工程是指光学工程.
- 生物物理学的生物物理.
背景情况:
- 眼内透镜 (IOL) 在白内障手术后对视力纠正至关重要.
- 了解IOLs在中央轴之外的光学性能对于预测视觉结果至关重要.
- 单焦 IOL 是为单个焦点设计的,但它们的功率可以根据视角而有所不同.
研究的目的:
- 要量化单焦眼内镜 (IOL) 功率的角度依赖.
- 为了比较测量的离轴IOL功率与理论预测.
主要方法:
- 实验室研究涉及两种IOL模型 (APPALENS 207,SN60WF) 的功率从17到25二光 (D).
- IOL被安装在液体室中,并使用激光射线追踪进行测试.
- 在轴上和轴外的功率被测量在30到+30度的角度.
主要成果:
- 随着入射角度和IOL功率的增加,外围失焦显著增加.
- 在±30度时,外围失焦在4.9至8.5D之间,这取决于IOL类型和功率.
- 与理论预测相比,测量的接触力显示了±0.50 D的平均差异.
结论:
- 单焦 IOL 引入了相当大的外围失焦,受 IOL 功率和设计的影响.
- 在将天然晶状透镜替换为内腔透镜后,外围失焦形状发生了显著的变化.
- IOL功率的角度依赖是术后视觉质量的关键因素.
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