A person whose eyes have refractive error; someone with nearsightedness, farsightedness, or astigmatism that requires correction.
From Greek 'a-' (not) + 'metron' (measure, proper) + '-ope' (eye). The term emerged in optometry and ophthalmology to classify people with non-perfect vision.
Technically, if you wear glasses or contacts, you're an ametrope—which sounds clinical and unfortunate, but really it just means your eyeballs bent light slightly wrong, affecting about 2 billion people on Earth, making 'normal' vision kind of the unusual one.
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