Decentration associated with asymmetric capsular shrinkage and intraocular lens size

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Abstract
In rabbits. After a D-shaped anterior capsulotomy that covered about half the area of an ordinary circular capsulotomy was performed in 19 eyes of ten white rabbits, a 14.0 mm IOL was fixated in the bag in one eye and a 12.5 mm IOL in the other eye. A circular anterior capsulotomy was performed in 16 eyes of eight controls and IOLs were similarly placed in the bag. Decentration of the 14.0 mm and 12.5 mm IOLs in the eyes with the D-shaped anterior capsulotomy did not differ eight weeks after the procedure. However, marked rotation from the initial position and decentration to the side opposite to that expected were observed in some eyes in which nodular opacification was observed. Both the 14.0 mm and 12.5 mm IOLs were markedly more displaced in eyes with the D-shaped anterior capsulotomy than in eyes with the circular anterior capsulotomy. These results confirm that asymmetric capsular shrinkage, which is affected by the anterior capsulotomy shape, influences postoperative IOL centration. *Reprint requests to Shunsaku Ohmi, M.D., Department of ophthalmology, Wakayama Medical College, 7-Bancho 27, Wakayama 640, Japan. Presented at the Symposium on Cataract, IOL and Refractive Surgery, San Diego, April 1992. © Williams & Wilkins 1993. All Rights Reserved....