Screening relatives of patients with familial chronic open angle glaucoma.

Abstract

To describe the value and the results of screening of family members of individuals with familial chronic open-angle glaucoma (COAG) for the disease. Cross-sectional study of families with COAG. Eighty-six individuals from 15 families with COAG. Complete ophthalmologic examinations, automated perimetry, and optic nerve photography. Disease status as glaucoma patient (at least two of three parameters abnormal: intraocular pressure, visual field, or disc appearance), glaucoma suspect (one of three parameters abnormal), or normal. Twenty-six relatives were diagnosed with COAG. The diagnosis was most frequently made on the basis of intraocular pressure readings and automated perimetry. Twenty-three relatives were classified as glaucoma suspects; automated perimetry was the most useful modality for the detection of abnormalities in these individuals. Siblings of COAG patients had the highest risk of COAG developing (64.7%) compared with children (13.2%) or other blood relatives (22.2%). When COAG is present in more than one family member, immediate and other relatives should be evaluated for glaucoma by means of clinical examination and automated perimetry.