keratometry
C2CEFR level
96/100Rarity: very rare
TechnicalRegister
The measurement of the curvature of the front surface of the cornea.
Keratometry is essential before fitting contact lenses so the curve matches the eye.
Rarity runs from 0 (a word everyone knows) to 100 (almost never seen outside specialist or literary writing). Level is the word's real difficulty on the CEFR scale, from A1 to C2.
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