Term: mydriasis
Literally
meaning: “process
to be a red hot mass ”
Origin: Anc Greek
μυδρίασις/mydriasis(=excessive enlargement of the pupil) > μύδρος>mydros(=red hot mass or rock fragments that are ejected violently
from a volcano crater)
Coined/History
The use of the
word is attributed to Greek physician Galen of Pergamon
(130–200 AD) but Hippocrates (460BC-ca.370BC) is said to
have used a cautery tool (mydros) as an instrument to cause pupil dilation
because of fear.
Definition
Mydriasis is the persistent and excessive dilation of
the pupil (>6mm) that does not return
to normal state even under influence of light. Mydriasis is caused usually by
use of certain drugs or trauma to the eye.
In addition , the ophthalmologist may ind
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