"An eye test or visual examination is a series of tests performed by an optometrist for assessing the visual health and check the ability of the patient to perceive both distance and near objects, multiple eye tests are conducted to assess the function of the eyes. Health care professionals often recommend that periodic and thorough eye examinations as part of routine primary care, especially since many eye diseases are mostly asymptomatic and some conditions including Glaucoma and uncorrected refractive errors being the most common causes for preventable blindness.
Eye examinations may detect potentially treatable blinding eye diseases, and also help in understanding the effects of systemic diseases like Diabetes and hypertension on the eye or signs of tumor’s or other anomalies of the brain.
A full eye examination consists of an external examination, followed by specific tests for evaluating the eye health, pupil function, function of the ocular muscles and its motility, intraocular pressure and examination of the retina.
A minimal eye examination consists of tests for visual acuity, pupil function, and extraocular muscle motility, as well as direct ophthalmoscopy through an undilated pupil."