The terms glaucoma and cataract in the ancient Greek and Byzantine writers.

The authors deal with the meaning of the terms glaucosis and hypochyma, in the texts of ancient Greek and Byzantine medical writers. The analysis of these texts shows us that the meanings of these terms do not correspond to the modern ones. In the texts the term glaucosis corresponds to the modern cataract, and the term hypochyma to the pathological formation of a kind of membrane which appears in the space of the pupil, due to coagulation of a fluid.