Bilateral symmetrical retinal cysts.

Ocular movements, cover test, and visual fields to confrontation were all normal. Pupils were equal and active, but showed some corectopia upwards and nasally. The left eye was markedly hypermetropic, but disc and macula were both normal, and examination of the rest of the fundus at this stage revealed no abnormality which might account for the poor visual acuity. The right cornea had an extensive superficial abrasion, with a deep laceration in the temporal half which reached Descemet's membrane in places, but did not penetrate it. The anterior chamber contained some free cells, but iris and lens were undamaged. A clear fundus view was not possible; no serious intra-ocular damage could be seen. After removal of all possible fragments of glass, atropine ointment was instilled, and the eye padded. After 24 hours the corneal abrasion had healed and fundus examination revealed a circumscribed area of what appeared to be retinal detachment in the temporal periphery, extending inwards for about two disc diameters. The contours of this detachment were smooth and regular, without folds, and the whole had a rather globular appearance. Its colour was the same as that of the surrounding retina, but the retinal vessels which coursed over it were rather darker than normal. No hole or tear could be found, and a diagnosis of post-traumatic detachment was made. A further examination of the left fundus, howevet, revealed a similar but slightly smaller detachment in a symmetrical situation, thus making the true nature of the condition apparent (Figs 1 and 2, opposite). The patient had never had any previous eye trouble though his left eye had always been weak. His general health was good, and there were no signs of congenital anomalies.