Wasserman D, Apple D J, Castaneda V E, Tsai J C, Morgan R C, Assia E I
Department of Ophthalmology, Medical University of South Carolina, Charleston 29425.
Ophthalmology. 1991 Apr;98(4):425-31. doi: 10.1016/s0161-6420(91)32274-7.
Two hundred fifty consecutive postmortem eyes containing posterior chamber intraocular lenses (PC IOLs) were analyzed according to the presence and number of radial anterior capsular tears. Over 90% of cases had been done with the "can opener" technique. A surprisingly high percentage of cases, 86%, had one to five radial tears. Furthermore, our analysis showed that the most consistent and most permanent in-the-bag fixation was achieved when only one tear or less was present in the anterior capsule. Because this study shows that the incidence of radial tears is very high after nuclear expression with "can opener" capsulectomy, it provides a scientific basis supporting the transition toward the continuous circular capsulorhexis technique that is slowly evolving. The latter technique has been shown to minimize the incidence of anterior capsular radial tears. This may ultimately serve to decrease the incidence of PC IOL decentration, an important goal if the use of bimultifocal IOLs and IOLs with small or aspheric optics is to be successful.
对250只连续的含有后房型人工晶状体（PC IOL）的尸眼，根据放射状前囊撕裂的有无及数量进行分析。超过90%的病例采用“开罐式”技术完成手术。令人惊讶的是，高达86%的病例有一至五条放射状撕裂。此外，我们的分析表明，当前囊仅有一条或更少的撕裂时，可实现最稳定、最持久的囊袋内固定。由于本研究表明，采用“开罐式”晶状体囊外摘除术娩核后放射状撕裂的发生率很高，因此为向正在逐步发展的连续环形撕囊技术过渡提供了科学依据。后一种技术已被证明可将前囊放射状撕裂的发生率降至最低。这最终可能有助于降低PC IOL偏心的发生率，如果要成功使用双焦点IOL和具有小光学区或非球面光学区的IOL，这是一个重要目标。
