Downing J E
J Cataract Refract Surg. 1986 Nov;12(6):651-4. doi: 10.1016/s0886-3350(86)80079-7.
The incidence of secondary capsulotomy was studied in a group of 757 posterior chamber intraocular lenses placed with the convex surface posterior within the capsular bag. Minimum follow-up was 12 months and ranged up to 61 months, with a mean of 33 months. In the first year, only 2.9% of cases required discission, but this rose to 15.7% at five years. The need for capsulotomy with angled-haptic lenses was 7.9% at three years; it was 15.0% with uniplanar lenses (P = .04). This difference appeared to be due to better apposition of the optic to the posterior capsule in the angled lenses, creating a more effective barrier to epithelial pearl migration. Capsulotomy carries significant risks and lens designs that minimize the long-term need for capsulotomy should be sought. Convex posterior lenses with angled haptics have a low incidence of posterior capsule opacification.
对一组757枚后房型人工晶状体进行了研究，这些人工晶状体以凸面后置的方式植入囊袋内。最短随访时间为12个月，最长达61个月，平均随访时间为33个月。在第一年，仅2.9%的病例需要切开，但到五年时这一比例升至15.7%。有角度襻的人工晶状体在三年时需要进行囊切开术的比例为7.9%；单平面人工晶状体的这一比例为15.0%（P = 0.04）。这种差异似乎是由于有角度的人工晶状体光学部与后囊的贴附更好，对上皮珠迁移形成了更有效的屏障。囊切开术有重大风险，应寻求能将长期囊切开术需求降至最低的晶状体设计。带角度襻的凸面后置人工晶状体后囊混浊发生率较低。
