基于眼睛广角光学模型计算人工晶状体

Calculation of an IOL from the wide-angle optical model of the eye.

作者信息

Pomerantzeff O, Pankratov M M, Wang G J

出版信息

J Am Intraocul Implant Soc. 1985 Jan;11(1):37-43. doi: 10.1016/s0146-2776(85)80114-2.

Abstract

Currently used paraxial formulas for calculating the power of an intraocular lens (IOL) ignore the pupillary aperture of the eye (3.5 mm) and assume that the locations of the principal planes of the crystalline lens and cornea are known. For calculating IOL performance, only the axial point in the field is considered. The eccentricity of the ocular optical system and the probable error in the IOL centering are also ignored. The use of a wide-angle optical model of the aphakic eye for computation of the IOL would result in values that approach more closely those in the real eye. The performance of the implanted IOL could then be calculated in conditions that are much closer to reality. To obtain information on the precision required in preoperative measurement of the asphericity of the cornea, we have studied the effect of corneal asphericity on IOL performance.

摘要

目前用于计算人工晶状体（IOL）屈光度的近轴公式忽略了眼睛的瞳孔孔径（3.5毫米），并假定晶状体和角膜主平面的位置是已知的。在计算IOL性能时，仅考虑视场中的轴点。眼内光学系统的偏心率和IOL对中的可能误差也被忽略。使用无晶状体眼的广角光学模型来计算IOL，将得到更接近真实眼睛的值。然后可以在更接近实际的条件下计算植入IOL的性能。为了获得有关术前测量角膜非球面性所需精度的信息，我们研究了角膜非球面性对IOL性能的影响。