Answer: convex lens
Hyperopia (farsightedness) is a vision problem in which close objects are confusingly perceived. This is because the eyeball of a hyperopic person is shorter than the normal eye and the image forms behind the retina.
Therefore, these people have difficulty seeing objects up close.
To solve this, convex lenses are used. This type of lens are thicker at the center than at its edges and their function is to converge the rays of light so that they can reach the region of the retina called macula and the image can be formed correctly.