Page 2 - HA-defects of vision

4. The far point distance of a short sighted person is 1.5meters. find the focal
length, power and nature of the remedial lens? (-1.5 m, -0.67D, concave lens)

5. A person having a myopic eye uses a concave lens of focal length 10 cm.
Find the power of the lens. (-10D)

6. A person with myopic eyes is nit able to see objects beyond 3 m. determine
the nature, focal length and power of the correcting lens? (divergent, -3m,-
3.3D)

7. A person can see clearly up to 3m. Name the defect of vision he is suffering
from. What type of lens should be used so that he can clearly see up to
12m.find its power. (-0.25D)