Pupillons motor system after a cataract operation

Background: The goal of a cataract operation is to achieve an optimal outco me,which includes a round and functioning pupil. The goal of this study was to analyze the influence of cataract operations on pupils that appear to b e normal on silt-lamp examination postoperatively. Patients and methods: A videopupillography was performed on 47 eyes of 47 p atients after phacoemulsification without complications in the first eye,an d on 12 eyes of 12 patients after phacoemulsification without complications in the second eye. Results: After surgery, the first eyes showed a significantly more constric ted pupil compared to the non-operated eye independently of the stage of ir ritation. After surgery of the second eye, this was only observed under nea r dark conditions. Conclusion: Even the morphologically normal pupil shows a change in motilit y postoperatively. We believe that the reason for this is the mechanical ma nipulation of the iris during cataract operation. During this, the sensitiv e dilator muscle of the pupil is affected, leading to temporary or permanen t changes in pupillary function. The change in motility of the contralatera l, non-operated eye cannot be easily explained. The pupil size is important for the visual process and alteration of its function allows an evaluation of the quality of the operation.