Eye chart number). The denominator indicates the distance in feet at which a person with normal vision could stand to correctly identify the same symbols identified by the person tested. For example, a visual acuity of 20/20 is considered normal. Numerous types of eye charts exist and are used in various situations. For example, the Snellen chart is designed for use at 6 meters or 20 feet, and is thus appropriate for testing distance vision. There is often also a need to test a subject's vision at near or occupational tasks (such as reading or computer use). For these situations, a Rosenbaum
Eye care in the United Kingdom eye examinations, and an estimated 1,900 of people were likely to have had their condition remedied. In Wales the entitlement to sight tests is similar to that in England, except that most optometrists can also offer a free eye test to people who: People qualify for help with the cost of glasses or contact lenses if they are: Qualifying people get an NHS optical voucher, the value of which depends on their prescription. The voucher can be cashed with any supplier who accepts NHS optical vouchers. Between 1948 and 1985 the NHS supplied spectacle frames. In 1949 there were ten