ametropia

noun

am·​e·​tro·​pia ˌa-mə-ˈtrō-pē-ə 

: an abnormal refractive condition (such as myopia, hyperopia, or astigmatism) of the eye in which images fail to focus upon the retina

ametropic

ˌa-mə-ˈtrō-pik 

-ˈträ-

adjective

Word History

Etymology

New Latin, from Greek ametros without measure (from a- + metron measure) + New Latin -opia — more at measure

First Known Use

1860, in the meaning defined above

Medical Definition

ametropia

noun

am·​e·​tro·​pia ˌam-ə-ˈtrō-pē-ə 

: an abnormal refractive eye condition (as myopia, hyperopia, or astigmatism) in which images fail to focus upon the retina

ametropic

-ˈtrō-pik  -ˈträp-ik 

adjective