Eye chart smaller towards the bottom of the chart. The person removes any glasses or contact lenses, and stands or sits a standardized distance from the chart (e.g., 20 feet for the Snellen chart). The person is then asked to identify the optotypes on the chart, starting with large rows and continuing to smaller rows until the optotypes cannot be reliably identified any more. The row in which the person can reliably identify symbols defines the visual acuity. One eye is tested at a time. Practically, this is accomplished by covering the other eye with a hand, piece of paper, or a
Eye care in the United Kingdom Eye care in the United Kingdom Eye care in the United Kingdom is available through the National Health Service. Eye care in the community is almost entirely provided by optometrists in private practice. Specialist NHS services are provided from a small number of eye hospitals, and their staff often run clinics in general hospitals in their region. Free NHS sight tests in England and Northern Ireland are available to anyone who is: People who are unable to visit and optician can have a mobile sight test where an optometrist comes to visit their home or a day centre. The patient