Koch P S
Koch Eye Associates, Warwick, Rhode Island 02886.
J Cataract Refract Surg. 1991;17 Suppl:661-7. doi: 10.1016/s0886-3350(13)80680-3.
This report examines the structural components of incision construction for cataract surgery so the causes of corneal instability and astigmatism can be understood. Changing the shape of the external incision, from limbus-parallel to linear to curved away from the limbus, results in a more stable external incision. The internal entry incision is more directly associated with corneal instability, however, and its construction and closure are crucial. Corneal stability improves as the closure changes from radial to horizontal to corneal valve autoclosure. Hyphema rates also improve with this progression because blood is directed into the anterior chamber with posterior incision closure, but out of the eye with anterior corneal valve closure.
本报告研究了白内障手术切口构建的结构组成部分，以便了解角膜不稳定和散光的原因。将外部切口的形状从平行于角膜缘改为直线形，再改为远离角膜缘的弧形，可使外部切口更稳定。然而，内部进入切口与角膜不稳定的关联更为直接，其构建和闭合至关重要。随着闭合方式从放射状改为水平状再改为角膜瓣自动闭合，角膜稳定性得到改善。前房积血发生率也随着这一进程而降低，因为后切口闭合时血液进入前房，而角膜前瓣闭合时血液流出眼外。
