Integrated reading lenses for sunglasses

摘要

A reading lens to be held by the lens frame of sunglasses includes a transparent optical element, at least a portion of which includes a predetermined vision corrective light-refracting curvature. The optical element includes a glass or plastic construction having a spectral filter for allowing passage of a predetermined spectrum of light wavelengths therethrough to optimize viewing in a sunlit environment. The optical element includes a polarized filter for inhibiting light reflected from horizontal surfaces and includes an anti-reflective coating. The optical element includes a light transmission ratio that blocks a predetermined quantity of sunlights e.g. a tint for reducing sunlight intensity. The light transmission ratio may be constant throughout the optical element or may have a gradient distribution.