[Prosthetic iris devices]

Aniridia or iris deficiencies can severely affect visual function in mostly younger patients and should therefore be corrected. Currently various technical options for the treatment of iris deficiencies are available. The present review considers the main causes of aniridia and the incidence and summarizes the negative effects on visual function. A brief historical overview of the development of prosthetic iris devices is given. Currently available prosthetic iris devices, mainly iris diaphragm lenses and segmental prosthetic iris devices, are presented along with the specific advantages and disadvantages. The management of patients with iris deficiencies is often challenging due to the great heterogeneity and complexity of the underlying ocular problems. Thus an individual approach considering the often difficult pathological situation is mandatory. However, some universally valid recommendations for the implantation of prosthetic iris devices can be given. The literature from 2000 onward is reviewed and all articles on implantation of prosthetic iris devices are evaluated. The results are discussed and also summarized in a table.