An optical lens to be worn in front of an eye of a wearer having at least one prescribed refractive power Px, the optical lens including two opposite optical faces and a plurality of contiguous optical elements at least part of the optical elements having an optical function of not focusing an image on the retina of the eye of the wearer so as to slow down the progression of the abnormal refraction of the eye. Over a pupil having at least a 4 mm diameter, one can measure in a plane corresponding to the at least one prescribed refractive power along at least one direction, a Modulation Transfer Function through the optical lens greater than 0.1 between 0 and 20 cyc/deg.

An optical lens intended to be worn in front of an eye of a wearer having at least one prescribed refractive power Px, the optical lens comprising two opposite optical faces and a plurality of contiguous optical elements at least part of the optical elements having an optical function of not focusing an image on the retina of the eye of the wearer so as to slow down the progression of the abnormal refraction of the eye, wherein: —over a pupil having at least a 4 mm diameter, one can measure in a plane corresponding to the at least one prescribed refractive power along at least one direction, a Modulation Transfer Function through the optical lens greater than 0.1 between 0 and 20 cyc/deg; —a majority of the light rays passing through the optical lens over said pupil pass through at least one of the plurality of optical elements, and —each of the contiguous optical element verifies that Formula (I) with d a characteristic dimension of the contour of said optical element in mm, |P| the absolute value of a characteristic optical power of said optical element expressed in diopter, and K a number greater or equal to 0.9 and smaller than or equal to 1.7.

The present invention provides a non-corrective spectacle lens which is a molded plastic lens used by a person having normal eyesight, or a polarizing lens constituted by the molded plastic lens and a polarizing film integrally superposed on the molded plastic lens. In order to moderately reduce the movement of the muscle necessary for focus adjustment, the non-corrective spectacle lens has a spherical power S within the range of −1.0 D≤S<−0.1 D, where D is diopter as a unit of the spherical power S.

A lens with an embedded foil is produced by positioning a foil on a holder, providing adhesive attachment dots on the foil on surface portions opposite to the holder, positioning a front mould ensuring the contact of the dots with a front mould surface, retracting the holder and positioning a back mould opposite to the front mould. The mould is then connected with a sealing bridge to build an assembly forming a mould cavity with a pouring opening. The edge of the foil is spaced apart from the bridge and the assembly has passages between the dots, the foil, and the front mould surface allowing pouring a monomer into the cavity before curing the monomer, decomposing the assembly and cutting the lens from the polymer block.

A lens with an embedded foil is produced, comprising the steps of providing a first mold and a second mold, providing a functional foil, positioning and attaching the functional foil on the first mold, aligning the second mold relatively to the first mold, sealing the mold cavity between the first mold and the second mold, and filling a curable monomer mixture into the mold cavity, wherein either the molds are heated before the alignment step or the molds are heated after the sealing step and the following filling step is conducted with a heated monomer, or the heating of the molds follows the filling step of the UV curable monomer, followed by a UV curing step of the heated UV curable monomer mixture within the heated mold cavity.

A lens element intended to be worn in front of an eye of a wearer having a refraction area having a refractive power based on a prescription for said eye of the wearer, an a plurality of at least two optical elements having an optical function of not focusing an image on the retina of the eye of the wearer, wherein the refraction area comprises a plurality of respectively independent island-shaped areas, the refraction area is formed as the area other than the optical elements and each refraction island shape area is within one optical element.

A method of producing a lens with an embedded foil, comprising the steps of positioning a foil (10) on a foil fixation holder, providing adhesive attachment dots (41) on the foil (10) on surface portions (12) opposite to the foil fixation holder, positioning the front mould (30) ensuring the contact of the attachment dots (41) with a surface (31) of the front mould (30), retracting the foil fixation holder and positioning a back mould (120) opposite to the front mould (30). Then the front mould (30) and the rear mould (120) are connected with a sealing bridging element (90) to build an assembly in order to form a mould cavity (45, 155) with a pouring opening, wherein the edge (11) of the foil (10) is spaced apart (112) from the bridging element (90) and the assembly comprises passages between the attachment dots (141), the foil (10) and the front mould backside (31) allowing pouring a monomer into the entire mould cavity (45, 155) before curing the monomer and decomposing the assembly as well as cutting the lens with the embedded foil from the polymer block.

A mold element (350) is fabricated (305, 310, 315) using a first mold (5) with which microstructures (323) are integrally formed in relief on the mold element (350). A lens (340) is cast (320, 325, 330, 335) using a second mold (7) that includes the mold element (350) such that the microstructures (337) are integrally formed on the lens (340).

The invention relates to a process for producing an optical casting comprising at least one volume-holographic optical element by means of at least one casting operation, the process comprising the following steps: providing a casting mould comprising a first mould section having a flat, spherical, aspherical or free-form first surface and a second mould section having a flat, spherical, aspherical or free-form second surface, the first mould section being connectable to the second mould section to form the casting mould, providing at least one holographic optical element, positioning and aligning the at least one holographic optical element with respect to the first mould section or/and with respect to the second mould section, combining the first and second mould sections to form the casting mould, introducing casting material in one or more casting steps, the casting material having a maximum viscosity at 25° C. of 100 000 mPas, curing the casting material, removing the cured casting material comprising the at least one holographic optical element from the casting mould, the at least one holographic optical element being at least partly surrounded by the casting material.

The invention relates to an ophthalmic device (1) satisfying a prescription for at least one power correction for a wearer, to a method for manufacturing it and to a use of a semi-finished hybrid ophthalmic lens.

The device comprises at least one electro-active cell (3) which comprises a rear shell (4) and a front shell (5) defining for the device a backside surface and an opposite front surface, the shells (4 and 5) being provided with transparent electrodes and delimiting a sealed cavity.

According to the invention, the rear shell (4) derives from a semi-finished hybrid ophthalmic lens comprising: a front mineral part having a first mineral face proximal to the front shell (5) and a second mineral face opposite to the first mineral face, and a rear plastic part attached to the front mineral part, the rear plastic part having a front plastic face bonded to said second mineral face and an unsurfaced rear plastic face which defines said backside surface and is configured to impart said prescription to the ophthalmic device, after surfacing said semi-finished hybrid ophthalmic lens.