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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, advocacy and local ...
Distance PD is the separation between the visual axes of the eyes in their primary position, as the subject fixates on an infinitely distant object. Near PD is the separation between the visual axes of the eyes, at the plane of the spectacle lenses, as the subject fixates on a near object at the intended working distance.
Myopia, also known as near-sightedness and short-sightedness, [5] is an eye disease [6] [7] [8] where light from distant objects focuses in front of, instead of on, the retina. [1] [2] [7] As a result, distant objects appear blurry while close objects appear normal. [1] Other symptoms may include headaches and eye strain.
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 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 developed by his professor ...
Eye Care Foundation ( ECF) is an international charity organisation active in over 20 countries in Asia, [4] Africa [5] [6] and Latin-America. [7] ECF was founded when Eyecare Worldwide and Mekong Eye Doctors joined forces in 2008. [8] The two organizations shared the same objectives and working together as the current foundation has proved to ...
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As of 2020, Google Maps was being used by over one billion people every month around the world. [1] Google Maps began as a C++ desktop program developed by brothers Lars and Jens Rasmussen at Where 2 Technologies. In October 2004, the company was acquired by Google, which converted it into a web application.
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