In Myopia, the eye lens converges light too strongly or the eyeball is too long, causing the image to focus in front of the retina. A concave lens diverges light before it enters the eye, reducing the overall converging power and shifting the focus onto the retina. In Hypermetropia, the eye lens converges light too weakly or the eyeball is too short, causing the image to focus behind the retina. A convex lens converges light before it enters the eye, increasing the overall converging power and shifting the focus onto the retina.
Myopia and Hypermetropia can be respectively corrected by
Asked in RPSC RAS Prelims 2023 · Topic: Optics (Thin and Thick Lenses, lens combinations)
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