Cherry P M, Tutton M K, Bell A, Neave C, Fichte C
Corneal Laser Centre, Clatterbridge Hospital, Bebington, Wirral, UK.
J Refract Corneal Surg. 1994 Mar-Apr;10(2 Suppl):S239-45.
The Summit Technology erodible mask treatment of astigmatism does not alter the keratometric astigmatism significantly, even though the refractive astigmatism appears to improve by about 50%. Myopia is satisfactorily treated with the erodible mask, but there is slightly more undercorrection compared to photorefractive keratectomy (PRK) using an expanding diaphragm. Increasing the minus power in ordering the mask cylinder improves the myopia result, but not the keratometric astigmatism result. The following factors do not influence the keratometric astigmatism result: 1) The type of astigmatism (with-, against-the-rule, or oblique); 2) The initial keratometry readings; and 3) The time from the commencement of epithelial removal to laser treatment.
Summit技术的可蚀性角膜面罩治疗散光，尽管屈光性散光似乎改善了约50%，但对角膜散光的改变并不显著。可蚀性角膜面罩对近视的治疗效果令人满意，但与使用扩张光阑的准分子原位角膜磨镶术（PRK）相比，欠矫情况略多。增加订购角膜面罩柱镜的负度数可改善近视治疗效果，但对角膜散光治疗效果无改善。以下因素不影响角膜散光治疗效果：1）散光类型（顺规、逆规或斜向）；2）初始角膜曲率计读数；3）从上皮去除开始到激光治疗的时间。
