ophthalmology - the branch of medicine concerned with the eye and its diseases

vision defect, visual defect, visual disorder, visual impairment - impairment of the sense of sight

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

farsightedness, hypermetropia, hypermetropy, hyperopia, longsightedness - abnormal condition in which vision for distant objects is better than for near objects