Manufacturing defect of a Zeiss multifocal intraocular lens

Introduction: A case of cataract surgery with multifocal intraocular lens (IOL) insertion where the lens was found to have a manufacturing defect with decentred diffractive rings on the optic is reported. Patient and clinical findings: A toric AT LISA tri (Carl Zeiss Meditec AG) IOL was implanted into the capsular bag in the right eye of a 58-year-old woman. After implantation it was noted that the diffractive rings were off center and not aligned with the toric lens markings. Diagnosis, intervention, and outcomes: The IOL was explanted and another IOL of the same type and power was inserted. Conclusions: This case shows that centration defects of multifocal IOLs exist. Surgeons need to be aware of this and make sure they have instruments on hand for explantation and backup IOLs for each case.