US Patent 7857444 Ophthalmic lens incorporating an optical insert for projecting information

The invention provides an eyesight correcting lens having a front face and a rear face, and into which light beams emitted by a light beam generator system are introduced via an inlet surface and directed towards the eye of an ametropic wearer of said lens to enable information content to be viewed, an optical insert being included in the lens, said lens being arranged so as to enable the wearer of said lens to provide an accommodation effort that is less than or equal to 2D when viewing the information content.