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| Myopia |
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| You must have seen some people holding books very close to their eyes. This is because they suffering from myopia (short sightedness). A myopic person cannot see distant objects clearly because the far point of his eye is less than infinity. |
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| Myopia is the defect of the eye due to which the eye is not able to see the distant objects clearly. |
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| Myopia is due to: |
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 the elongation of the eye ball, that is, the distance between the retina and eye lens is increased. |
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 decrease in focal length of the eye lens. |
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| Normal Eye - The image is formed on the retina |
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| Eye Ball Too Long |
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| A myopic eye forms the image of a far off object in front of the retina because of the increase in converging power of the eye lens. Therefore myopia can be rectified by using a suitable divergent or concave lens. |
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| Correction of myopia using a concave lens |
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