medical specialty, medicine - the branches of medical science that deal with nonsurgical techniques

ametropia - (ophthalmology) faulty refraction of light rays in the eye as in astigmatism or myopia

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

myopia, nearsightedness, shortsightedness - (ophthalmology) eyesight abnormality resulting from the eye's faulty refractive ability; distant objects appear blurred

astigmatism, astigmia - (ophthalmology) impaired eyesight resulting usually from irregular conformation of the cornea