Question

Your friend has weak eyesight .he is unable to see the writing on the board but refuses to wear his glasses.As a result he is not able to do well in his assignments.how would you encourage him to wear glasses.what you say to convince him.do you think your friend will listej you .why/why not

Answer 1

my friend can not see the writing on the board...this means he is suffering from a eye defect called myopia.it is also called as near-sightedness.In this type of eye defect the focal length of the eye lens is less than 2.5cm .this is because of not adjusting of focal length. the adjusting or accommodation of focal length is done by the help of ciliary musles
I'll practically do an experiment to show to show the result before and after using glasses..
I'll try my level best to convince him