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Improve your vision with Eye Charts
Eye charts are used to measure visual acuity. These charts display several rows of optotypes or test symbols. Each row consists of alphabet and symbols of different size. The person is asked to identify the numbers or letters on the chart, usually starting with large rows and continuing to the smaller rows until the letters and symbols cannot be identified anymore. It is one of the bases on which a doctor gets to know whether a person is suffering from an eye-sight problem or not.
Eye charts are also available for very young children or illiterate adults. These eye charts do not require letter recognition, instead they use simple pictures or patterns. Some of the eye charts also use the block letter "E" turned in different orientations. It is called the Tumbling E. The patient simply has to indicate the direction in which the letter "E" is facing.
The Landolt C eye charts are of a similar kind. They consist of rows with circles. Each circle has a different segment missing and the test-taker describes where each broken piece is located. Another option is the Hanks Paediatric Eye Chart. These eye charts use symbols which are easily recognisable by children, such as heart, apple, house, and flower. These symbols are then calibrated for the testing distances.
Generally, eye charts are designed for use at 6 metres or 20 feet. However, there might arise a need to test a subject's vision at near or occupational tasks like reading or working on a computer. For such situations, near-point charts have been created. For example, the Hanks Near-Point Eye Charts. It includes a typical range of text sizes and a selection of contemporary near tasks like music, VDU display, newsprint, telephone book, and many others.
Eye charts not only help in testing the eye-sight of a person, but also helps them perform various eye exercises. Eye charts provide an objective way for a person to check his visual fitness progress. As a person experiments with various vision improvement techniques, the eye chart helps him decide which exercises work and which ones don't work for him.
Medical equipment like pulse oximeters, body fat monitor and medical clogs are also available to enable a person to keep a check on his health. If you want to know more about eye charts and other medical accessories, such as medical bags, doctors bags, and power plate, just log on to www.medscope.co.uk.