A lens is a transparent material, such a glass, that has either one curved surface and one flat surface or two curved surfaces. Convex lenses ( also called positive lenses, plus lenses, converging lenses, and condensers) are thicker in the middle then the edges and concave are thicker at the edges then the middle. There are three main types of convex lenses: plano-convex lenses, double-convex lenses, and concavo-convex lenses. The convex lenses are used to bend the light rays which will change the focal point-point of focus. They are used in eyeglasses, contacts, microscopes, telescopes and cameras, etc. B2BManufactures.Com offers listing of Taiwan & China Convex Lenses manufacturers and Converging Lenses suppliers with explicit company profiles, product categories & product images. Global buyers could send inquires online.