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Landolt C. Lea test. logMAR chart. An eye chart is a chart used to measure visual acuity comprising lines of optotypes in ranges of sizes. Optotypes are the letters or symbols shown on an eye chart. [ 1] Eye charts are often used by health care professionals, such as optometrists, physicians and nurses, to screen persons for vision impairment.
Snellen chart. Purpose. Snellen chart is used to estimate visual acuity (last three rows are 20/15, 20/13 and 20/10) A Snellen chart is an eye chart that can be used to measure visual acuity. Snellen charts are named after the Dutch ophthalmologist Herman Snellen who developed the chart in 1862 as a measurement tool for the acuity formula ...
Orbis International. Orbis International is an international non-profit non-governmental organization (NGO) dedicated to saving sight worldwide. [ 1][non-primary source needed] Its programs focus on the prevention of blindness and the treatment of blinding eye diseases in developing countries through hands-on training, public health education ...
The International Agency for the Prevention of Blindness ( IAPB) is a global alliance of eye health organisations working for the prevention of blindness and vision impairment. [4] IAPB was established in 1975 to work as an umbrella body for global blindness prevention activities. This agency is a partner of World Health Organization.
Ophthalmology ( / ˌɒfθælˈmɒlədʒi /, OFF-thal-MOL-ə-jee) [ 1] is a clinical and surgical specialty within medicine that deals with the diagnosis and treatment of eye disorders. [ 2] A former term is oculism . An ophthalmologist is a physician who undergoes subspecialty training in medical and surgical eye care. [ 3]
Seva Foundation is an international non-profit health organization based in Berkeley, California, known for preventing and treating blindness and other visual impairments. It was co-founded in 1978 by Dr. Larry Brilliant, Ram Dass, Wavy Gravy, Nicole Grasset and Govindappa Venkataswamy. Steve Jobs served as an early adviser and major ...
Before its passage, most of the expansion in public health programs occurred at the state and local levels. Many factors helped its passage including the environment of the Progressive Era. [69] Massachusetts, Connecticut, and Illinois never participated in the program. Participation in the program varied depending on states.