A transparent plastic sheet has been refined or casting thin sheets and rupkratha are close to the curve of the arch, black eye. To adjust the curve are both inside and out, there are various sizes according to the refractive power of the eye disorders. There are approximately 1 mm thickness, diameter 7-15 mm thin and tears that are on the surface of the eye lens, next to serves the black eye. At present, both the color and the color does not exist.
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