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角膜无球性的基于种族的差异:眼内透镜功率计算,图像质量和白内障手术后视觉敏度,使用眼睛模型

Kamal K Das¹, Rajaraman Suryakumar¹, Wei Lu¹

¹Research and Development, Alcon Research LLC, Fort Worth, TX, USA.

Clinical ophthalmology (Auckland, N.Z.)

|August 4, 2025

概括

角膜无球性和球形偏差 (SA) 不显著影响眼内透镜 (IOL) 功率或视力敏度 (VA) 在不同的种族. 这一发现表明,无论患者的种族,对IOL选择采用标准化的方法可能是合适的.

科学领域:

眼科医生眼科眼科
生物医学工程生物医学工程
眼镜测量是指眼睛的测量.

背景情况:

角膜无球性和球形偏差 (SA) 是关键的光学特性,可以影响眼内透镜 (IOL) 植入后的视觉结果.
记录了角膜形状和异常的种族差异,这引发了关于当前IOL功率计算公式的普遍适用性的问题.

研究的目的:

调查角膜亚球性和SA在IOL功率和预测视力敏度 (VA) 上的种族变化的影响.
为了确定是否需要针对种族的特定调整来计算IOL功率.

主要方法:

使用已发表的临床数据,开发了代表12个不同的种族群体的个体眼睛模型.
对于6毫米瞳孔的模拟角膜SA,跨组范围为0.17至0.31微米.
评估IOL功率差异和计算视觉性能 (MTF,VA) 使用球形和不球形IOL在不同的失焦水平下.

主要成果:

Corneal SA 在各个族群之间有所不同,但最大的 IOL 功率差异是最小的 (约. -0.1 D) 对于克莱伦CNA0T0镜头与平均角膜相比.
球形和无球形的IOL在各个种族之间都表现一致,而无球形的IOL显示出稍微更好的MTF和VA.
对CNA0T0镜头计算的A常数在各族群中显示出最小的差异 (119.029-119.151).

结论:

角膜无球性和SA的种族差异对IOL功率和预测的视觉结果的影响微不足道.
克莱伦CNA0T0镜头使用单个A-Constant可能适用于不同种族的人口.
目前的IOL计算方法似乎足够强大,可以适应种族差异而不需要进行特定调整.

关键词:

一个A-常数.在 IOL 中计算功率.作为一个球体,它具有asphericity.民族身份民族身份球形偏差是指球形偏差.视力敏度视力敏度视力敏度

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