emmetropia Meaning, Definition & Usage

  1. noun (ophthalmology) the normal refractive condition of the eye in which there is clear focus of light on the retina

WordNet

Em`me*tro"pi*a noun
Etymology
NL., fr. Gr. in measure, proportioned, suitable ( in + measure) + , , eye.
Definitions
  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, an astigmatism.

Webster 1913