am·e·tro·pi·a 
(ăm′ĭ-trōpē-ə)
(ăm′ĭ-trōpē-ə)n.
An eye abnormality, such as nearsightedness, farsightedness, or astigmatism, resulting from faulty refractive ability of the eye.
[Greek ametros, without measure (a-, without; see A-1 + metron, measure; see METER1) + -OPIA.]
am′e·tropic (-trŏpĭk, -trōpĭk) adj.