on myopia____lens of spetsls is used
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Explanation:
Myopia means short-sightedness, in this, a person has a clear vision when looking at objects close to them, but distant objects will appear blurred, to correct it easily concave lens is placed in front of a myopic eye, moving the image back to the retina and clarifying the image.
Hypermetropia means long sight in which a person have blurred vision when looking at objects close to them, and clearer vision when looking at objects in the distance. By placing a convex lens in front of a hypermetropic eye, the image is moved forward and focuses correctly on the retina.