Arnold P N
Arnold Cataract Center, Springfield, Missouri 65804.
J Cataract Refract Surg. 1994 Jul;20(4):446-50. doi: 10.1016/s0886-3350(13)80182-4.
Anecdotal reports and in vitro and clinical studies indicate that 5.0 mm x 6.0 mm ovoid posterior chamber lenses may have a higher incidence of photic phenomena, perhaps caused when the thicker truncated lens edge presents within the pupillary aperture. To evaluate these subjective phenomena, we gave a questionnaire to a random sample of patients who received one of three different poly(methyl methacrylate) (PMMA) posterior chamber lens optic styles (5.0 x 6.0 mm ovoid, 7.0 mm round, 5.5 mm round) placed in the bag. About 20% of all IOL groups reported photic phenomena, with symptoms similar between groups. The percentage reporting persistent phenomena was also comparable. We concluded that eyes in which any IOL optic is covered by the anterior capsular edge do not have a higher incidence of photic phenomena, which may instead result from the PMMA or vitreoretinal traction after cataract extraction.
轶事报告以及体外和临床研究表明，5.0毫米×6.0毫米的椭圆形后房型人工晶状体出现光学现象的发生率可能更高，这可能是由于较厚的截短晶状体边缘出现在瞳孔孔径内所致。为了评估这些主观现象，我们向接受了三种不同聚甲基丙烯酸甲酯（PMMA）后房型人工晶状体光学样式（5.0×6.0毫米椭圆形、7.0毫米圆形、5.5毫米圆形）之一并植入囊袋内的患者随机样本发放了问卷。所有人工晶状体组中约20%报告了光学现象，各小组之间症状相似。报告持续性现象的百分比也相当。我们得出结论，任何人工晶状体光学部被前囊边缘覆盖的眼睛出现光学现象的发生率并不更高，光学现象反而可能是由白内障摘除术后的PMMA或玻璃体视网膜牵引引起的。
