refractive error
B2CEFR level
68/100Rarity: rare
TechnicalRegister
A condition in which the eye fails to focus light precisely on the retina, causing blurred vision.
Much of his reduced acuity was simply an uncorrected refractive error that improved with a pinhole.
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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