Patent ID: 8714739

Claim:
A product ( 30 ) for optical use, the product comprising at least three splittable superposed layers, namely: a transparent and flexible optical layer ( 31 ) that has two opposite optical faces ( 33 , 34 ), one of which is adapted to be applied to an eyeglass lens, and that presents a characteristic thickness (e 1 ) and a Young's modulus (E 1 ); a first packaging layer ( 35 ) for packaging said optical layer ( 31 ), which first packaging layer ( 35 ) is fastened to one of the two optical faces ( 33 , 34 ) of the optical layer ( 31 ) and presents a characteristic thickness (e 2 ) and a Young's modulus (E 2 ); and a second packaging layer ( 36 ) for packaging said optical layer ( 31 ), which second packaging layer ( 36 ) is fastened to the other optical face ( 33 , 34 ) of the optical layer ( 31 ) and presents a characteristic thickness (e 3 ) and a Young's modulus (E 3 ); wherein, each layer ( 31 , 34 , 35 ) presents a stiffness defined as a linear function of the product of its Young's modulus multiplied by its characteristic thickness, and said first packaging layer ( 35 ) presents stiffness that is greater than the stiffness of said optical layer ( 31 ) and that is suitable for enabling the product ( 30 ) to be machined by means of an eyeglass lens shaper appliance ( 200 ), and wherein the optical layer ( 31 ) is manually detachable from each packaging layer ( 35 , 36 ) to enable it subsequently to be fitted on an eyeglass lens.