A descriptive questionnaire based survey of 25 eye centres (from 14 countries) involving 1465 prevalent cases in 2006 was performed. Recurrent oral aphthous ulcers were reported in 94.5%, skin lesions in 69.5% and genital ulcers in 61.4%. Most of the patients had bilateral and recurrent intraocular inflammation. Panuveitis was significantly more frequent in men than women and men tended to have a worse visual outcome. Overall, 23% of the patients had visual acuity 20/200 at the final visit. Kitaichi et al note that despite modern treatments, Behçet's disease still carries a poor visual prognosis with one quarter of the patients becoming blind. The patients with poor vision were more frequently from India, Iran and Japan.
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