Question

what happens if the eye lens of a person cannot accommodate its focal length more than 2.4 cm?

Answer 1

the person suffers myopia.otherwise known as short sight

Answer 2

if a eye lens of a person cannot accommodate its focal length more than 2.4cm then he suffers with eye defect Myopia.
in such case he can see only near objects clearly and person cannot see objects at long distance.
Hence it is called as Near sightedness.