(ophthalmology) eyesight abnormality resulting from the eye's faulty refractive ability; distant objects appear blurred
source: WordNet 3.0
Nearsightedness; shortsightedness; a condition of the eye in which the rays from distant object are brought to a focus before they reach the retina, and hence form an indistinct image; while the rays from very near objects are normally converged so as to produce a distinct image. It is corrected by the use of a concave lens.