question_answer

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

A)  the person can read the letters of 6 inches from a distance of 12m

B)  the person can read the letters of 12 inches from 6 m

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

D)  the focal length of eye lens had become half that off-he normal eye