Prospective study of pupil motility in pseudophakia

We operated on 148 patients with age-related cataracts using the envelope technique and intraocular lens implantation in the capsular bag. Pupil diameters were measured on the day before surgery and again two months after. In pseudophakic eyes, morphologic examinations revealed 80 intact pupils, 32 pupils with slight changes, and 36 pupils with marked alterations. However, no substantial alterations in pupil diameter were observed. The photopic diameter, which was enlarged by approximately 17%, was the exception. Near pupil reactivity showed a 28% reduction; reactivity to light was decreased by 26%. The abnormalities were more frequent after complicated operations and in older patients, but it was not possible to predict postoperative diameters in individual cases.