Emmetropia

n.

1.

(Med.) That refractive condition of the eye in which the rays of light are all brought accurately and without undue effort to a focus upon the retina; - opposed to hypermetropia, myopia, and astigmatism.

Noun

1.

emmetropia - (ophthalmology) the normal refractive condition of the eye in which there is clear focus of light on the retina

ophthalmology, physiological condition, physiological state