三联手术中的人工晶状体屈光度计算
Intraocular lens power calculations in the triple procedure.
作者信息
Abdel-Hakim A S, Khalil A
机构信息
Department of Ophthalmology, Cairo University Hospital, Egypt.
出版信息
Br J Ophthalmol. 1989 Sep;73(9):709-13. doi: 10.1136/bjo.73.9.709.
When a triple procedure is planned, calculation of the intraocular lens becomes a problem. Postoperative corneal power bears no relation to preoperative power, and the axial length of the globe also changes. A prospective study of 24 keratoplasties revealed a close relationship between postoperative corneal power and donor corneal power. Changes in axial length were found to be too small to produce errors in calculation. The equation derived in this series to describe the relation between postoperative and donor corneal power is applicable only when certain trephine sizes are used and when the recepient cornea is not excessively scarred.
当计划进行三联手术时，人工晶状体的计算就成了一个问题。术后角膜屈光度与术前屈光度无关，眼球的眼轴长度也会发生变化。一项对24例角膜移植术的前瞻性研究表明，术后角膜屈光度与供体角膜屈光度之间存在密切关系。发现眼轴长度的变化太小，不会在计算中产生误差。本系列中推导的用于描述术后与供体角膜屈光度之间关系的公式仅在使用特定环钻尺寸且受体角膜不过度瘢痕化时适用。
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