Articles: PDF OnlyPhotic phenomena after phacoemulsification and posterior chamber lens implantation of various optic sizesArnold, Paul N. M.D.*,1Author Information *Reprint requests to Paul N. Arnold, M.D., Arnold Cataract Center, 1265 East Primrose, Springfield, Missouri 65804 1Dr. Arnold has no financial interest in any of the lenses evaluated. Presented in part at the 3rd American-International Congress on Cataract, IOL and Refractive Surgery, Seattle, May 1993. Journal of Cataract & Refractive Surgery: July 1994 - Volume 20 - Issue 4 - p 446-450 doi: 10.1016/S0886-3350(13)80182-4 Free Metrics Abstract Anecdotal reports and in vitro and clinical studies indicate that 5.0 mm × 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 × 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. © Williams & Wilkins 1994. All Rights Reserved.