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An optician while testing the eyes finds the vision of a patient to be $6 / 12$ . By this he means that:

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the person can read the letters of 6 inches from a distance of 12 cm

the person can read the letters of 12 inches from 6 cm

the person can read the letters from 6m which the normal eye can read from 12 m

the focal length of eye lens had become half that of the normal eye.

answer is C.

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The person can read the letters from 6m which the normal eye can read from 12 m

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