Question

18.A student unable to see the things written on black board of class room, he/she visited the doctor and doctor suggested him/her to use the spectacles of power -2 D, Which type of defect student have ?

(1 Point)

hypermetropia

myopia

presbyopia

astigmatism

Submit​

Answer 1

Answer:

Explanation:myopia

Answer 2

Answer:

Myopia

EXPLANATION

here given that p = - 2D

1 / F = - 2 m

F = - 1 / 2

F = - 0.5 m

here negative sign shows that the lens is concave ....

so for myopia concave lens is used to correct the defect...