CITY CONDITIONS UPDATE: The Wills Eye Hospital building, staff, and patients have been safe during the protests in the City. We will continue to monitor the situation. Friday care will proceed as scheduled at 840 Walnut Street unless conditions change. Please contact your physician if you are unable to keep your appointment.


When the eye's iris is malformed or absent, this condition is called aniridia. This is a rare condition that has a genetic link. It affects about one in 50,000 babies. Children with aniridia should be checked routinely for glaucoma, which is also associated with this condition. Children with aniridia are also at risk for developing cataract, nystagmus and corneal vascularization — blood vessels growing across the normally clear front of the eye — as well as abnormalities of the macula — the area of the retina at which visual perception is most acute.