Abstract: A light shield is provided which includes a relatively thin but preferably rigid body of light permeable material. An arrangement is interposed between the body of light permeable material and one side of the lens to mount the shield directly on the lens in light intercepting relationship relative to the eye of a user of the lens. The shield which is preferably mounted in generally cantilever manner on the lens is removable and can be reinstalled repeatedly. Preferably an adhesive is used which provides for a minimum of residue on the lens and the shield is preferably affixed to the lens in such a way that there is a minimum of optical interference. The shield can be such as to strip out ultraviolet rays, infrared light or otherwise modulate the light transmitted therethrough. The shield may also be of a form which provides prescription corrections of an optical type.