In measuring the sight will be measuring the level of visibility and the ability to include pictures. By measuring the tools called Phoropter, which is large and cannot be found to have. It is a problem when the space agency to examine the eyes of the patient or patient's eyesight check-in areas where there is no electricity, so can't check. Faculty who make approved invention tools called Worth 4 Dot or gauge is the ability to combine the images. This tool, which will help the doctor out of the area, or in areas where there is no electricity available to more easily because the portable and requires no electricity and can also diagnose a disease to get treatment quickly, such as eye disease, Slacker, both in children and adults, etc from trial tools Worth 4 Dot outcomes equivalent to check with a Phoropter.
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