What does "emmetropia" mean?

The condition of perfect vision, where images are correctly brought to a focus on the retina.

Emmetropia

Common synonyms include: emmetropization, no refractive error, normal refractive state, zero diopter refractive error, zero refractive error.

noun

noun ·Rare ·Advanced level

Noun

1
The condition of perfect vision, where images are correctly brought to a focus on the retina. uncountable, usually
2
(ophthalmology) the normal refractive condition of the eye in which there is clear focus of light on the retina wordnet

From Ancient Greek ἔμμετρος (émmetros, “in measure, proportioned”) + -opia (“vision”).