A method of manufacturing of an astigmatic contact lens having a toric portion and a ballast portion such that said ballast portion causes the toric portion of the contact lens to properly orient in the eye of the wearer. The toric lenses are manufactured by an effective process control method for cylinder axis angle in toric lens production by modifying the target cylinder angle for mold rotation by eliminating the accumulative cylinder axis error from all previous steps including tool making, tool assembly, and molding. The amount modifying the target angle is determined by accurately determine the true cylinder axis on the corresponding mold by using a high-resolution interferometer, such as FISBA FS10M or equivalent models from Trioptics Shape vertical series.

An imaging lens element includes an optical effective section, an outer diameter surface, at least two cut traces and at least two clearance surfaces. The optical effective section has an optical axis. The outer diameter surface surrounds the optical effective section. Each of the cut traces is shrunk from an outer diameter reference plane of the outer diameter surface toward a center of the imaging lens element. The clearance surfaces are connected between each of the cut traces and the outer diameter surface, respectively. At least one of the cut traces includes a first surface, and a curvature center of the first surface is closer to the center of the imaging lens element than the first surface to the center of the imaging lens element thereto.

A method of forming a mold insert used to produce an intraocular lens (IOL) mold is disclosed herein. The method includes providing stock material and cutting the stock material, which includes multiple cutting steps. The cutting steps are performed on transitional regions of supporting portions of the mold insert. Peripheral surfaces of the mold insert have varying roughness values, and supporting portions of the mold insert have a greater roughness than the optical portion of the mold insert. An IOL is also disclosed herein that is formed using an IOL mold that is injection molded using the mold insert. A method of forming the IOL is also disclosed herein.

In an embodiment, there is provided an apparatus. The apparatus includes an optic configured for a selected illumination application. The optic includes a first lens structure and a second lens structure. The first lens structure includes a first planar external surface configured to receive incident light, and a first internal nonplanar refractive surface opposing the first planar external surface. The second lens structure includes a second planar external surface configured to emit output light, and a second internal nonplanar refractive surface opposing the second planar external surface. The second planar external surface opposes the first planar external surface. The first internal nonplanar refractive surface and the second internal nonplanar refractive surface define a cavity. The first internal nonplanar refractive surface, the second internal nonplanar refractive surface, and the cavity are positioned between the first planar external surface and the second planar external surface. The first internal nonplanar refractive surface and the second internal nonplanar refractive surface are configured to refract received light to yield emitted light having a target output parameter corresponding to the selected illumination application.

The marker according to the present invention comprises: a first surface which has light transmissivity, and in which a plurality of cylindrical projection surfaces each having a first ridge line oriented in a first direction are arranged in a second direction that is perpendicular to the first direction; and a second surface which has a plurality of to-be-detected parts that are projected onto the plurality of projection surfaces, and a reflection part that is a region other than the to-be-detected parts and includes a plurality of depressions or a plurality of protrusions. The reflection part has either a plurality of depressions which are arranged such that second ridge lines are disposed periodically or a plurality of protrusions which are arranged such that second trough bottom lines are disposed periodically. The second ridge lines or the second trough bottom lines are slanted with respect to the first ridge lines.

Optical assemblies include optical elements aligned through the engagement of toroidal protrusions and toroidal grooves. A plurality of optical elements each having an inner portion having and a surrounding outer portion form a stack. Pairs of contiguous optical elements along the stack engage each other at an engagement interface including a toroidal protrusion on the outer portion of one optical element and a toroidal groove on the outer portion of the other optical element. The toroidal protrusions and groove have a symmetry of revolution about an optical axis of the inner portion of the corresponding optical element, with toroidal protrusions and toroidal grooves engaging each other having a same radius of revolution. Similar toroidal engagement of an optical element is with an annular support.

Apparatuses, systems and methods for providing improved intraocular lenses (IOLs), include features for reducing side effects, such as halos, glare and best focus shifts, in multifocal refractive lenses and extended depth of focus lenses. Exemplary ophthalmic lenses can include a continuous, power progressive aspheric surface based on two or more merged optical zones, the aspheric surface being defined by a single aspheric equation. Continuous power progressive intraocular lenses can mitigate optical side effects that typically result from abrupt optical steps. Aspheric power progressive and aspheric extended depth of focus lenses can be combined with diffractive lens profiles to further enhance visual performance while minimizing dysphotopsia effects. The combination can provide an increased depth of focus that is greater than an individual depth of focus of either the refractive profile or the diffractive profile.

A method of providing a male mold half for molding a toric contact lens at a predetermined target rotational orientation is disclosed. The method comprises the steps of: providing the male mold half at a predetermined rotational orientation, picking the male mold half up with a gripper having a central axis, rotating the gripper with the male mold half about the central axis of the gripper by a predetermined rotational angle (?) towards the predetermined target rotational orientation, and releasing the rotated male mold half from the gripper. Prior to picking the male mold half up, the method comprises centering the grippe and the male mold half relative to each other such that the central axis of the gripper and a central axis of the male mold half coincide.

Apparatuses, systems and methods for providing improved intraocular lenses (IOLs), include features for reducing side effects, such as halos, glare and best focus shifts, in multifocal refractive lenses and extended depth of focus lenses. Exemplary ophthalmic lenses can include a continuous, power progressive aspheric surface based on two or more merged optical zones, the aspheric surface being defined by a single aspheric equation. Continuous power progressive intraocular lenses can mitigate optical side effects that typically result from abrupt optical steps. Aspheric power progressive and aspheric extended depth of focus lenses can be combined with diffractive lens profiles to further enhance visual performance while minimizing dysphotopsia effects. The combination can provide an increased depth of focus that is greater than an individual depth of focus of either the refractive profile or the diffractive profile.

Apparatuses, systems and methods for providing improved intraocular lenses (IOLs), include features for reducing side effects, such as halos, glare and best focus shifts, in multifocal refractive lenses and extended depth of focus lenses. Exemplary ophthalmic lenses can include a continuous, power progressive aspheric surface based on two or more merged optical zones, the aspheric surface being defined by a single aspheric equation. Continuous power progressive intraocular lenses can mitigate optical side effects that typically result from abrupt optical steps. Aspheric power progressive and aspheric extended depth of focus lenses can be combined with diffractive lens profiles to further enhance visual performance while minimizing dysphotopsia effects. The combination can provide an increased depth of focus that is greater than an individual depth of focus of either the refractive profile or the diffractive profile.