Purpose: To determine the prevalence of vitreous cysts in patients with retinitis pigmentosa (RP). Methods: We retrospectively reviewed the charts of 435 consecutive patients diagnosed as having typical RP. Results: Vitreous cysts were diagnosed in 37 eyes of 28 patients with RP (13 males and 15 females; mean age 47.0 ± 19.8 years; range 15–79 years), for an overall prevalence of 6.4 %. The cysts were observed bilaterally in nine of the patients (32.1 %). Among these 28 patients, 11 (39.3 %) were younger than 40 years. In all, 81.8 % of the vitreous cysts were detected around the optic nerve head. Conclusions: We demonstrated that the prevalence of vitreous cysts was 6.4 % in patients with RP. These cysts were considered to be asymptomatic.
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