THE NORMAL EYE: PHYSIOLOGICAL AND APHYSIOLOGICAL REFRACTION.
D001251:Astigmatism; D006257:Head; D006801:Humans; D006956:Hyperopia; D007194:India; D009216:Myopia; D013508:Ophthalmologic Surgical Procedures; D012029:Refraction, Ocular
ASTIGMATISM; HYPEROPIA; INDIA; MYOPIA; REFRACTION, OCULAR