Thompson V M, Seiler T, Durrie D S, Cavanaugh T B
Ophthalmology, Ltd, Sioux Falls, SD 57105.
Refract Corneal Surg. 1993 Mar-Apr;9(2 Suppl):S134-7.
The holmium:YAG laser can be used to perform corneal collagen shrinkage and treat refractive errors. Studies are underway for the treatment of hyperopia by shrinking collagen in the peripheral cornea, which produces central and paracentral steepening. There is initial overcorrection followed by a regression of effect postoperatively, which appears to stabilize 4 to 6 months postoperatively. Refinement of current nomograms and definition of the amount of expected regression will enhance its accuracy. The holmium:YAG laser may be superior to radial thermokeratoplasty with a hot needle. Nearly 100 years ago, Lans was the first to report that heating of the cornea could induce collagen shrinkage with resultant corneal curvature changes. Various collagen shrinkage procedures have evolved since then. To date, the most well-known form of collagen shrinkage involves the hot needle and a technique developed by Fyodorov to do radial thermokeratoplasty for hyperopia. This article will review the current state of holmium:YAG laser technology and the advantages it may provide over radial thermokeratoplasty.
钇铝石榴石激光可用于进行角膜胶原收缩并治疗屈光不正。目前正在进行通过收缩周边角膜中的胶原治疗远视的研究，这会导致中央和旁中央变陡。术后最初会出现过矫，随后效果会消退，似乎在术后4至6个月稳定下来。完善当前的列线图并确定预期消退量将提高其准确性。钬:钇铝石榴石激光可能优于热针放射状角膜热成形术。近100年前，兰斯首次报告加热角膜可诱导胶原收缩并导致角膜曲率改变。从那时起，各种胶原收缩手术不断发展。迄今为止，最著名的胶原收缩形式涉及热针以及费奥多罗夫开发的用于远视放射状角膜热成形术的技术。本文将综述钬:钇铝石榴石激光技术的现状及其相对于放射状角膜热成形术可能具有的优势。
