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ALTHOUGH comparatively rare, spontaneous cysts of the ciliary body have evoked numerous contributions to the literature. The diagnosis is essentially clinical and differentiation from a melanosarcoma may be very difficult. These cysts were well named pseudo-melanosarcomata by Pagenstecher (1910). Before the report of Fischer (1920), the diagnosis of such cysts had been established only by histological examination of enucleated eyes.Since then, Elschnig (1925), Olsson (1944), Scheie Grignolo (1954) have also reported cysts of the ciliary body as a clinical finding in otherwise normal eyes. Case ReportsCase 1, a man aged 21, was admitted to hospital on May 4, 1958 for treatment of psoriasis.He was referred on account of a complaint of difficulty with close work. There was no history of injury to either eye.The visual acuity was 6/5 in each eye. He was emmetropic and, apart from a near point of convergence of 12 cm., orthophoric. His pupils were equal and circular, reacting directly and consensually to light and on accommodation. Examination with both the slit lamp and the ophthalmoscope revealed no abnormality in the left eye.In an otherwise normal right eye, examination with the ophthalmoscope revealed a cystic mass presenting at the inferior temporal quadrant of the posterior chamber (Fig. lA, overleaf).When the pupil was fully dilated, slit-lamp examination (Fig. 1B, overleaf) revealed a smooth cyst containing a clear fluid and enclosed by a thin transparent membrane which was bespeckled with fine iridescent particles on its posterior surface, i.e. the surface presented to the zonular fibres and vitreous face. (This fine pigment has been incorrectly exaggerated in the artist's drawing, as has been the distortion of the lens.) The cyst had insinuated itself between the posterior surface of the iris and the anterior surface of the lens. Where the cyst was in contact with the anterior lens capsule, there were a few subjacent opaque lens fibres. The cyst was tremulous on eye movements. The Goldmann lens showed that the cyst arose from the anterior part of the ciliary body. The rest of the ciliary body appeared normal. The angle of the anterior chamber, including the sector overlying the cyst, was of normal depth. There was no disturbance of pigmentation in the overlying iris. The tension in both eyes varied between 20-25 mm. Hg (Schiotz) over several serial readings. There was no evidence of any penetrating injury.This patient was observed for 6 months until he left the country, and during that time *

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