PURPOSE: The aim of this research is to study the patterns of ocular involvement in patients with biopsy-proven lung sarcoidosis and estimate the level of patients' awareness of possible ocular complications of sarcoidosis.METHODS: Fifty patients with biopsy-proven lung sarcoidosis were referred from the Department of Respiratory Medicine, University Hospital of Larissa, Greece.RESULTS: The most prominent ocular symptom was foreign body sensation in 15/50 patients (30%); only 6/50 of our patients (12%) were completely asymptomatic with respect to ocular symptoms. Anterior segment findings were: episcleritis in 8/50 patients (16%), iris nodules in 9/50 patients (18%), and cataract in 19/50 patients (38%). Periphlebitis was observed in 8/50 patients (16%), periarteritis in 8/50 patients (16%), epiretinal membrane in 6/50 patients (12%), and branch retinal vein occlusion in 7/50 of our patients (14%). Ten out of 50 patients (20%) had never visited an ophthalmologist before, whereas eight out of 50 patients (16%) had undergone an ophthalmic exam more than 2 years ago.CONCLUSIONS: Eye involvement is common in patient with biopsy-proven lung sarcoidosis and may occur even without prominent ocular symptoms.