The most common LED lens is the convex lens that is placed around the LED. However, as technology advances, other types of lenses are also becoming more common. There are square lenses, high dome lenses, medium dome lenses and flat lenses. Each with its own light distribution and mounting over the LED diode.

Optics in LED lighting can include the spatial distribution of light from the diode itself, and the reflectors, lenses, and holders that cut off or limit output light with mechanical blocking devices.