However, the new pupil cannot adjust to differing light conditions. The contact lenses mimic the natural iris pattern and feature a pupil opening to create a new aperture for the eye. The colour of the contact lenses matches that of the patient’s natural eye colour. In addition to the cosmetic correction, they can also help reduce glare. Prosthetic contact lenses are tinted, hand-painted or printed contact lenses that mask the iris and can also occlude the pupil. To alleviate the symptoms such as glare or reduced contrast vision, fully closed spectacles with blue blocking filters are recommended. Patients may feel stigmatised and suffer from psychological stress.ĭepending on the severity of the iris coloboma, the following treatment options may be useful: Since we usually look first into the face of another person, it is difficult to hide this defect. The effects on vision depend on the severity and size of the coloboma.Īnother aspect is the appearance, especially if the iris coloboma is large.

If this tear occurs below the normal pupil, patients encounter double vision since the “second” pupil caused by the tear is not covered by the upper lid. Blue blocking filters can help counteract the effects.Īn irregularly shaped pupil often indicates a tear at the base of the iris. People with iris coloboma are more sensitive to glare since more scattered light can enter the eye through the “enlarged pupil”. When the iris is defective, it can no longer perform this control function. The iris controls the amount of light entering the eye by adjusting the size of the pupil through two muscles. In this case, the coloboma often develops at the top of the iris. as a result of an accident when the iris is ruptured or after glaucoma surgery. Traumatic iris colobomas are an acquired condition that can occur e.g. CausesĬongenital iris colobomas are caused by the failed or incomplete closure of the embryonic fissure, which normally closes around the 6th week of pregnancy. It can be present from birth (congenital) or the result of eye surgery or eye trauma. A coloboma is a hole in one of the structures of the eye, such as the iris. The iris is the anterior-most part of the uvea (middle layer of the eye). Understanding iris coloboma – symptoms and treatmentĬoloboma comes from the Greek word “κολοβωμα” that can be translated as curtailed, mutilated or defect. Special visual aids for dry eye syndrome.Scanning and reading devices - turning text to speech.

Coloboma pupil