ABSTRACT
·AIM: To present a case of Coats' disease in adult and to illustrate the retinal findings.·METHODS: A case report.·RESULTS: A 63 years old Malay man, a known case of diabetes mellitus, presented with one year history of painless and progressive reduced vision in the right eye. Right eye visual acuity was counting finger 2 feet while left eye best corrected visual acuity was 6/12. Right fundus showed presence of extensive subretinal exudates at the temporal part of the posterior pole involving the macular area and nasal to the optic disc. It was associated with multiple areas of abnormal blood vessels temporal to the macula with attenuated vessels. Fundus fluorescein angiography(FFA) showed presence of telangiectatic vessels at the area of subretinal exudates and leakage of fluorescein from the telangiectatic vessels. The left eye was normal. Based on clinical and FFA findings, he was diagnosed to have adult Coats' disease. The right eye was treated with argon laser photocoagulation. Six months post laser, his visual acuity remained at 6/120 and there was minimal regression of the disease seen in the retina. ·CONCLUSION: The clinical and angiographic findings are important in diagnosing retinal telangiectasia. Treatment by laser photocoagulation in area of leakages may be beneficial in preventing visual loss.