A method of producing an optical device from a volume of a curable composition, includes the following steps: polymerizing a first portion of the volume by irradiating an external surface of the volume with a light irradiation, thereby increasing a transmittance of the first portion for the light irradiation; polymerizing a second portion of the volume by irradiating the second portion with the light irradiation through the external surface and the polymerized first portion, wherein the light irradiation has a light intensity varying over the external surface between a first light intensity and a second light intensity distinct from the second light intensity. A corresponding system is also described.

A molded contact lens comprising a stiffer optic zone relative to the peripheral zone of the contact lens provides an optical element for correcting astigmatism without the need for or substantially minimizing the need for the correction of rotational misalignment. The higher elastic modulus optic zone vaults over the cornea thereby allowing a tear lens to form. The tear lens follows or assumes the shape of the back surface of the contact lens. The combination of the tear lens and the optical zone provide an optical element for correction of refractive error.

A molded contact lens comprising a stiffer optic zone relative to the peripheral zone of the contact lens provides an optical element for correcting astigmatism without the need for or substantially minimizing the need for the correction of rotational misalignment. The higher elastic modulus optic zone vaults over the cornea thereby allowing a tear lens to form. The tear lens follows or assumes the shape of the back surface of the contact lens. The combination of the tear lens and the optical zone provide an optical element for correction of refractive error.

An apparatus and method for forming a contact lens. The method includes the steps of obtaining a Lens Reactive Mixture; submerging a convex optical quality surface of a forming optic in a reservoir containing the Lens Reactive Mixture; projecting a first Actinic Radiation having a first spectrum of wavelengths through pre-selected regions of the forming optic; wherein the pre-selected regions correspond to locations of the contact lens to be formed having a thickness greater than a pre-determined thickness, and wherein the first Actinic Radiation is selectively controlled to selectively polymerize or partially polymerize the Lens Reactive Mixture on a Voxel by Voxel basis at the pre-selected regions; projecting a second Actinic Radiation having a second different spectrum of wavelengths through the forming optic over a second region corresponding to an entirety of the contact lens to be formed, wherein the second Actinic Radiation is selectively controlled to selectively polymerize or partially polymerize the Lens Reactive Mixture on a Voxel by Voxel basis across the forming optic to form a Lens Precursor; removing the forming optic and formed Lens Precursor from the Lens Reactive Mixture; and applying a Fixing Radiation to form the contact lens.

An apparatus (1) for photolithographically forming an ophthalmic lens (L) comprises: a container (2) comprising a container bottom (20) with an inner surface (200) including a concave portion (201); a piston (4) comprising a distal piston end face (400) with a convex portion (401); wherein the piston (4) is arranged in the container (2) such that the convex portion (401) faces the concave portion (201), and wherein the piston is movably arranged in the container (2); a light source (5, 50) being arranged beneath the container bottom (20) for emitting light towards the container bottom (20); a mask (6) arranged between the light source (5, 50) and the container bottom (20), the mask (6) comprising a plurality of pixels (60) which are configured to be individually controlled to either allow the light emitted from the light source (5, 50) to pass through the individual pixels (60) and to impinge on that part of the container bottom (20) having the concave portion (201) of the inner surface (200), or to not allow the light emitted from the light source (5, 50) to pass through the individual pixels (60) and to prevent the light from impinging the container bottom (20), and a control unit (7) for controlling the individual pixels (60) of the mask (6) to allow for a formation of the ophthalmic lens (L) layer by layer (L1-L4).

A Free-form contact lens and method of making the same. The lens includes a posterior optical quality surface having a concave shape, an opposing anterior surface having a convex shape both of which join at a lens edge that defines an outer periphery of the contact lens, and at least a first lens feature having a predetermined shape and made of a first polymerized Reactive Mixture. The remainder of the lens is made of a second polymerized Reactive Mixture that is different than the first polymerized Reactive Mixture, and that is covalently bonded thereto.

A Free-form contact lens and method of making the same. The lens includes a posterior optical quality surface having a concave shape, an opposing anterior surface having a convex shape both of which join at a lens edge that defines an outer periphery of the contact lens, and at least a first lens feature having a predetermined shape and made of a first polymerized Reactive Mixture. The remainder of the lens is made of a second polymerized Reactive Mixture that is different than the first polymerized Reactive Mixture, and that is covalently bonded thereto.

A molded contact lens comprising a stiffer optic zone relative to the peripheral zone of the contact lens provides an optical element for correcting astigmatism without the need for or substantially minimizing the need for the correction of rotational misalignment. The higher elastic modulus optic zone vaults over the cornea thereby allowing a tear lens to form. The tear lens follows or assumes the shape of the back surface of the contact lens. The combination of the tear lens and the optical zone provide an optical element for correction of refractive error.

An apparatus (1) for photolithographically forming an ophthalmic lens (L) comprises: a container (2) comprising a container bottom (20) with an inner surface (200) including a concave portion (201); a piston (4) comprising a distal piston end face (400) with a convex portion (401); wherein the piston (4) is arranged in the container (2) such that the convex portion (401) faces the concave portion (201), and wherein the piston is movably arranged in the container (2); a light source (5, 50) being arranged beneath the container bottom (20) for emitting light towards the container bottom (20); a mask (6) arranged between the light source (5, 50) and the container bottom (20), the mask (6) comprising a plurality of pixels (60) which are configured to be individually controlled to either allow the light emitted from the light source (5, 50) to pass through the individual pixels (60) and to impinge on that part of the container bottom (20) having the concave portion (201) of the inner surface (200), or to not allow the light emitted from the light source (5, 50) to pass through the individual pixels (60) and to prevent the light from impinging the container bottom (20), and a control unit (7) for controlling the individual pixels (60) of the mask (6) to allow for a formation of the ophthalmic lens (L) layer by layer (L1-L4).

A molded contact lens comprising a stiffer optic zone relative to the peripheral zone of the contact lens provides an optical element for correcting astigmatism without the need for or substantially minimizing the need for the correction of rotational misalignment. The higher elastic modulus optic zone vaults over the cornea thereby allowing a tear lens to form. The tear lens follows or assumes the shape of the back surface of the contact lens. The combination of the tear lens and the optical zone provide an optical element for correction of refractive error.