Cravy T V
Ophthalmic Surg. 1979 Jan;10(1):38-49.
Obtaining a minimal amount of postoperative astigmatism following cataract surgery is becoming increasingly important. One aspect of the patient's surgery which should not be overlooked is the preoperative keratometry which provides a basis for preoperative planning of surgical technique to be used and a point of reference for determining the amount of change in astigmatism produced by the surgery. Analysis of the surgically induced change in astigmatism using the calculations described in this paper will allow the surgeon to evaluate his own techniques and to maximize his potential for obtaining consistently good postoperative astigmatic results without the need for suture removal. The method presented is based upon concepts in common use in surgical ophthalmology and requires only simple mathematical procedures, familiar to all with a background in algebra and trigonometry.
白内障手术后获得最小量的术后散光变得越来越重要。患者手术的一个不应被忽视的方面是术前角膜曲率测量，它为术前手术技术规划提供依据，并作为确定手术引起的散光变化量的参考点。使用本文所述的计算方法分析手术引起的散光变化，将使外科医生能够评估自己的技术，并在无需拆线的情况下，最大限度地提高获得持续良好术后散光结果的可能性。所提出的方法基于眼科手术中常用的概念，只需要简单的数学运算，任何具有代数和三角学背景的人都熟悉这些运算。
