what power of lens would you prescribed for a person who cannot see clearly beyond 120cm​

Sagot :

2.5d lens is the kind of lens for him p=1/0.4m(f=40cm)=3.5 D the person thus uses a convex lens... suffering from hypermetropia.⠀⠀

[tex]\large\purple{\boxed{{\colorbox{black}{Hope \: \: this \: \: helps}}}}[/tex]