in Medicine and Surgery, the name of a disease in the eye, wherein the crystalline humour is turned of a bluish or greenish colour, and its transparency hereby diminished.—The word comes from φαυνες, caesius, "sea-green, sky coloured or grayish."

Those in whom this disorder is forming, discover it hence, that all objects appear to them as through a cloud or mist; when entirely formed, the visual rays are all intercepted, and nothing is seen at all.

It is reckoned incurable, when invenetare, and in aged persons: and even under other circumstances, is very difficult of cure, externals proving of little service.

The internals best suited to it, are those used in the gutta serena. Jul. Cæsar Claudinus, Consul. 74. gives a remedy for the glaucoma.

The glaucoma is usually distinguished from the cataract or suffusion, in this, that in the cataract the whiteness appears in the pupil, very near the corner; but it shows deeper in the glaucoma. See SURGERY Index.