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astigmatish

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What is Refractive Error? Refractive errors are a type of vision problem which occurs when the eye cannot clearly focus image on the retina which causes vision to become blurred. About 40% of the world population have significant refractive error and different eye conditions that lead to different errors; as there are various types of refractive errors. It is the second major cause of visual impairment. Though it can be corrected simply by a pair…

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