Question

Which eye defect can be corrected by using 'bi-focal lens' consisting of both concave and convex lens?

Answer 1

Presbyopia can be corrected by using 'bi- focal lens'.

Answer 2

presbyopia is the defect of version due to which an old person .
This is due to loss of power of accommodation of eye .
- presbyopia is the defect of eye corrected by bifocal length .