analyse how the concave and convex lens spectacles rectify the fault of eyesight
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The lens changes the focus, so images fall on the retina as they should. ... A concave lens is used to correct myopia to help focus images on the retina (top right). Farsightedness, or hyperopia, occurs when objects are focused in back of the retina (bottom left). It is corrected with a convex lens (bottom right).
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