A convex lens is a lens that has thin edges but is thicker at the center. This lens can convert the light rays into beams. A convex lens can make both virtual and real images depending upon the position of the object. The convex lens is also used to start a fire with the rays of the sun, and most children have tried this after studying physics. This lens is used for hypermetropia. There are many other uses of the lens as well, like making optical instruments, microscopes, etc.