Nehama (med_cat) wrote in 1word1day,
Nehama
med_cat
1word1day

Friday words: Photopsia and phosphenes

Medical terms again, this week and the next:

Photopsia

Etymology
NL., fr. Gr. fw^s, fwto`s, light + 'o`psis sight.


(Med.)
An affection of the eye, in which the patient perceives luminous rays, flashes, coruscations, etc. See phosphene.

from Webster's Revised Unabridged Dictionary (1913)

These can be caused by eye diseases, or simply by pressure--the flashes one sees when one's eyes are closed, esp. if a little pressure is applied with the hands to the closed eyelids, are phosphenes.
Tags: greek, medical, noun, p, wordsmith: med_cat
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