A group of eye diseases that damage the optic nerve and can lead to blindness. Typically involves increased pressure within the eyeball.
From Greek 'glaukōma' meaning 'opacity of the lens,' derived from 'glaukos' (bluish-green or gray). Ancient Greeks named it for the characteristic blue-gray appearance the pupil takes on in advanced cases.
The ancient Greeks identified glaucoma by its distinctive blue-gray pupil appearance, which explains why the same root 'glaukos' gives us both 'glaucoma' and 'glaucous' (blue-green color). This shows how medical terminology often preserves ancient observational skills.
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