presbyopia
C1CEFR level
80/100Rarity: very rare
TechnicalRegister
The age-related loss of the eye's ability to focus on near objects, due to stiffening of the crystalline lens.
Most patients notice presbyopia in their mid-forties and start needing reading glasses.
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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