Olson R J
Ophthalmic Surg. 1980 Dec;11(12):838-42.
A mathematical derivation of the effect of penetrating keratoplasty on corneal curvature was used to examine many variables in corneal surgery. The amount of wound disparity taken up by the recipient cornea was found to be the major factor in determining the amount of astigmatism induced by host wound/donor tissue size disparities. The amount of disparity showed as essentially linear relationship with the amount of astigmatism, approximately 0.4 diopters for each 0.1 mm of wound disparity for each 10% of the amount of the distortion taken up by the cornea (7.5 mm trephine). The smaller the trephine, the more distortion could be expected for each increment of wound disparity. Variations in the corneal curvature of the donor cornea had a minimal effect on the amount of keratoplasty-induced astigmatism.
通过穿透性角膜移植术对角膜曲率影响的数学推导来研究角膜手术中的诸多变量。发现受体角膜所吸收的伤口差异量是决定宿主伤口/供体组织大小差异所诱导散光量的主要因素。差异量与散光量呈基本线性关系，对于角膜（7.5毫米环钻）所吸收变形量的每10%，每0.1毫米伤口差异约为0.4屈光度。环钻越小，伤口差异每增加一次，预期的变形就越大。供体角膜的角膜曲率变化对角膜移植术引起的散光量影响极小。
