Morphologic compatibility of intraocular lens haptics and the lens capsule

Abstract

Is, Department of Developmental Biology, National Institute for Basic Biology, Okazaki, Japan. Methods: Following implantation of a poly(methyl methacrylate) (PMMA) ring in three excised human capsular bags with continuous curvilinear capsulorhexis (CCC), IOLs with different overall lengths or haptic designs were implanted in the bags and photographed. The straight length of the area of contact between the haptic and the capsule equator on the photographs was measured to provide a quantitative index of in-the-bag fixation and the length from the external margin of the PMMA ring to the external margin of the loop along the maximal diameter of the capsular bag, to indicate the quantitative degree of capsular deformity induced by an IOL. Results: An IOL with modified-C loops produced better fit along the capsule equator and less deformity than an IOL with modified-J loops, and an IOL with an overall length of 12.0 or 12.5 mm produced a sufficiently good fit and less distortion of the capsular bag than an IOL with an overall length over 13.0 mm. Conclusion: An IOL with modified-C loops and an overall length of 12.0 or 12.5 mm is adequate for in-the-bag implantation following CCC. 1Reprint requests to Toshiyuki Nagamoto, MD, PhD, Department of Ophthalmology and Visual Sciences, Washington University School of Medicine, Campus Box 8096 660 South Euclid Avenue, St. Louis, Missouri 63110-1093, USA. aT. Nagamoto holds a Japanese patent on the intracapsular ring. Neither author has a financial or proprietary interest in the intraocular lenses used. Menicon Inc. provided intraocular lenses and Pharmacia & Upjohn, intraocular lenses and the intracapsular ring. © Williams & Wilkins 1997. All Rights Reserved....