Question

Why it is advised to maintain the distance of 25cm while reading or writing

Answer 1

Explanation: the power of accomodation of human eye is 25cm.

if you will read from distance more than 25 cm then it will cause your eye to have increased power of accomodation and you will suffer from hypermetropia and if you will read keeping at a distance less than that of 25 then you will suffer from myopia.

hence to avoid eye diseases and those worth eye contact lenses it is advised to read maintaining a distance of 25 cm