Question

please answer this question fast

Answer 1

1)The old person is suffering from an eye defect called pressbyopia.

2) a bifocal lens can be used to to see the distance object as well as the near objects clearly.

Answer 2

Heya !

Answer:

i] The old man is suffering from Presbyopia [optical disease - (causes :- gradually weakening of cilliar muscle which decreases the flexibility of eye lens)]

ii] Biofocal lenses will be required to see clearly both the nearby as well as distinct object.

It is used due to it's design .

This lenses distinct into 2 parts :

That is ;

a) Upper part which is made up of concave lens .

b) lower part which is made up of convex lens .

Hope this helps u .!