# Doctor has prescribed a lens having power +1.5 D. What will be the focal length of the lens? What is the type of the lens and what must be the defect of vision?

Doctor has prescribed a lens having power +1.5 D. What will be the focal length of the lens? What is the type of the lens and what must be the defect of vision?

Now, focal length of lens,$$f=\frac{1}{P} =\frac{1}{(+1.5D)} =\frac{10}{15} m$$=+0.67 m