Patent ID: 10327300

Abstract:
Apparatus and associated methods relate to a Dynamic Ultraviolet Light System (DUVLS) that directs ultraviolet (UV) light at an intensity controlled by a user or in response to an ambient light level to maintain a photochromic target lens in a darkened state. In an illustrative example, the target lens may be located in a brightly lighted environment separated by a UV filter from a broadband light source, such as the sun. The dynamic ultraviolet light system may have its output intensity regulated by a user or by a controller responsive to a light sensor. The light sensor may be configured to detect the ambient light level to which the target lens is being exposed. Various embodiments may advantageously enhance a user's vision by maintaining the user's spectacles with photochromic lenses, in a darkened state while the user is in a brightly lighted environment with substantially attenuated natural UV light levels.