Friedberg H L, Kline O R, Friedberg A H
Wills Eye Hospital, Philadelphia, Pennsylvania.
J Cataract Refract Surg. 1989 Sep;15(5):541-4. doi: 10.1016/s0886-3350(89)80113-0.
Unwanted optical images are noticed by a surprisingly large number of patients following cataract extraction with implantation of posterior chamber intraocular lenses (IOLs). These images are caused by the positioning holes, lens edge, or laser ridge. We studied 550 eyes in which one of seven different IOLs was inserted. The IOLs varied in optic diameter, the presence or absence of positioning holes or a laser ridge, the use of partial depth holes or placement of positioning holes in tabs outside the optical zone. We determined that unwanted optical images could practically be eliminated by using a 7 mm optic without positioning holes. This study also demonstrated that partial depth holes offer no advantage over full thickness holes for reducing unwanted optical images and that positioning holes, even on a 7 mm optic, produce a significant number of complaints.
令人惊讶的是，大量接受白内障摘除并植入后房型人工晶状体（IOL）的患者会注意到不必要的光学图像。这些图像是由定位孔、晶状体边缘或激光脊引起的。我们研究了550只眼睛，其中植入了七种不同IOL中的一种。这些IOL在光学直径、有无定位孔或激光脊、使用部分深度孔或在光学区外的小片上放置定位孔等方面存在差异。我们确定，使用无定位孔的7毫米光学区人工晶状体实际上可以消除不必要的光学图像。这项研究还表明，在减少不必要的光学图像方面，部分深度孔并不比全厚度孔有优势，而且即使是7毫米光学区的定位孔也会引发大量投诉。
