Hernandez Victor M, Cabot Florence, Ruggeri Marco, de Freitas Carolina, Ho Arthur, Yoo Sonia, Parel Jean-Marie, Manns Fabrice
Ophthalmic Biophysics Center and University of Miami Miller School of Medicine, Miami, FL, USA ; Biomedical Optics and Laser Laboratory, Department of Biomedical Engineering, University of Miami College of Engineering, Coral Gables, FL, USA.
Ophthalmic Biophysics Center and University of Miami Miller School of Medicine, Miami, FL, USA ; Anne Bates Leach Eye Hospital, Bascom Palmer Eye Institute, University of Miami Miller School of Medicine, Miami, FL, USA.
Biomed Opt Express. 2015 Oct 21;6(11):4501-15. doi: 10.1364/BOE.6.004501. eCollection 2015 Nov 1.
We present a method for measuring lens power from extended depth OCT biometry, corneal topography, and refraction using an improvement on the Bennett method. A reduced eye model was used to derive a formula for lens power in terms of ocular distances, corneal power, and objective spherical equivalent refraction. An error analysis shows that the formula predicts relaxed lens power with a theoretical accuracy of ± 0.5 D for refractive error ranging from -10 D to + 10 D. The formula was used to calculate lens power in 16 eyes of 8 human subjects. Mean lens power was 24.3 D ± 1.7 D.
我们提出了一种利用对贝内特方法的改进，从扩展深度光学相干断层扫描生物测量、角膜地形图和验光来测量晶状体屈光力的方法。使用简化眼模型推导了一个关于晶状体屈光力的公式，该公式依据眼内距离、角膜屈光力和客观球镜等效屈光不正来表示。误差分析表明，对于-10D至+10D的屈光不正范围，该公式预测的放松状态下晶状体屈光力的理论精度为±0.5D。该公式用于计算8名人类受试者16只眼睛的晶状体屈光力。平均晶状体屈光力为24.3D±1.7D。
