Method of producing gradient photochromic lens and product thereof

Abstract

A method of producing a gradient photochromic lens comprises providing a lens and a dyeing trough, with the lens including a front surface and a rear surface; immersing the lens in the dyeing trough to proceed with dyeing, and moving the lens out of the dyeing trough, forming a gradient dyed layer on each of the front surface and the rear surface of the lens after drying and hardening; providing a photochromic optical adhesive including a color changing agent combined with an optical adhesive; providing a film having a bonding face, and disposing the photochromic optical adhesive on the bonding face; and bonding the film to the front surface of the lens via the bonding face. The lens produced from the method provides a gradient photochromic effect while increasing the absorption effect of ultraviolet rays and prolonging the service life.

Dependencies are inferred from the claim text.