Abstract: Lenses incorporate freeform power profiles that at least one of slow, retard or preventing myopia progression. An ophthalmic lens includes a first zone at a center of the lens; a first peripheral region continuously extending from the center, the first peripheral region having a different dioptric power than at the center; and a second peripheral region continuously extending from the first peripheral region and having a different dioptric power than the first peripheral region, thereby providing a continuous freeform power profile having substantially equivalent visual performance to a single vision lens, and having a depth of focus and reduced retinal image quality sensitivity that slows, retards, or prevents myopia progression.

Abstract: The present disclosure relates to a variable focus lens containing graphene, a preparing method of the variable focus lens, a focus controlling method of the variable focus lens, and a display device including the variable focus lens.

Abstract: An optical zoom in a small form factor suitable for use in mobile devices such as cell phones, security cameras, and other small-scale imaging systems. One or more Alvarez lens pairs are provided, and moved transversely to the optical axis. The combination of one or more Alvarez lens pairs and the actuator permits a zoom power of at least 3× with a lateral displacement distance of the optical components of approximately five millimeters or less.

Abstract: A method is provided for determining the dominant eye of a person using equipment designed to acquire at least one image of the face of the person, then process the image, and finally return information enabling the person to know which eye is the dominant eye thereof. The method uses a sighting device that is identifiable and locatable in relation to the equipment, with the viewing being carried out through a window with both eyes open. The size of the window is such that it does not allow the person to see said target with both eyes at the same time. The equipment acquires at least one image for viewing the position of both eyes of the person, processing the image by performing calculations while taking into account the position of a central point located between both eyes, the position of the target and the position of the window.

Abstract: A variable magnification optical system consists of a first lens-group having negative refractive-power, a stop and a second lens-group having positive refractive-power in this order from an object-side. The first lens-group includes an L11 negative meniscus lens, an L12 negative lens and a C11 cemented lens, in which a biconcave lens and a positive lens are cemented together in this order from the object-side, in this order from the object-side. The second lens-group includes an L21 positive lens that is arranged closest to the object-side and includes at least one aspheric surface, and an object-side surface of which is convex, and only two cemented lenses toward an image-side of the L21 positive lens, and each of which consists of a negative lens and a positive lens cemented together in this order from the object-side. The following conditional expressions (1) and (2) are satisfied: ?1.0<Rf11/Rf12<0.7??(1); and 55.0<?dave1??(2).

Abstract: A lens unit may include a plurality of lenses, a lens holder, and a circular ring-shaped sealing member made of rubber. A first lens disposed closest to an object side is a plastic lens and formed with a small diameter part in a step shape on an image side of the first lens. A sealing member accommodation part is provided between an outer peripheral face of the small diameter part and an opposed face and accommodates the sealing member so as to have clearance in an optical axis direction. An inner face of the lens holder is formed with a sealing member coming-off prevention part which is projected to the sealing member accommodation part to narrow the clearance on the image side of the sealing member accommodation part and thereby movement to the image side of the sealing member is restricted.

Abstract: A zoom lens including first to seventh lens units arranged in this order from an object side to an image side is provided. The first to seventh lens units respectively have refractive powers of negative, positive, negative, positive, positive, negative. The first to seventh lens units are disposed along an optical axis of the zoom lens, and a distance between the seventh lens and the image side is fixed, and the first lens unit, the second lens unit, the third lens unit, the fourth lens unit, the fifth lens unit and the sixth lens unit are adapted to move along the optical axis between the object side and the image side.

Abstract: A zoom lens, including, in order from object side: a positive first unit which is fixed during zooming; a negative second unit which moves for zooming; a positive third unit which moves for zooming; a positive fourth unit which moves for zooming; and a positive fifth unit which is fixed during zooming, in which 1.50<LN(Z2)/LN(Z34)<2.30 and 0.70<f34w/f34t<0.96 are satisfied, where LN(Z2) is natural logarithm of Z2 obtained by dividing a lateral magnification ?2t of the second unit at telephoto end by a lateral magnification ?2w at wide angle end, LN(Z34) is natural logarithm of Z34 obtained by dividing a combined lateral magnification ?34t of the third unit and the fourth unit at telephoto end by a combined lateral magnification ?34w at wide angle end, and f34w and f34t are combined focal lengths of the third unit and the fourth unit at wide angle end and telephoto end, respectively.

Abstract: An ophthalmologic apparatus includes a photographing optical system configured to photograph a fundus of a subject's eye via a focusing lens, a projection unit configured to project, via a mask portion including an opening, a focusing index corresponding to the opening, and a driving unit configured to drive the focusing lens along an optical path based on a position of an image corresponding to the mask portion and a position of a focusing index image corresponding to the opening in a fundus image of the subject's eye.

Abstract: A zoom lens including, in order from object side, a positive first lens unit not moving for zooming, a negative second lens unit moving during zooming, at least one other lens unit moving during zooming as at least a third lens unit, and a rearmost lens unit closest to an image side not moving for zooming, and also including an aperture stop at the image side of the second lens unit, average values of Abbe numbers and relative partial dispersions of each of positive lenses and negative lenses forming the second lens unit, anomalous dispersion of a lens having a smallest Abbe number of negative lenses forming the rearmost lens unit, an axial distance between surface vertex positions of lenses closest to the object and image sides of the zoom lens, and a distance between the aperture stop and the negative lens at a wide angle end are appropriately set.

Abstract: Systems and methods for enhanced accuracy in optical coherence tomography imaging of the cornea are presented, including approaches for more accurate corneal surface modeling, pachymetry maps, keratometric values, and corneal power. These methods involve new scan patterns, an eye tracking mechanism for transverse motion feedback, and advanced motion correction algorithms. In one embodiment the methods comprise acquiring a first sparse set of data, using that data to create a corneal surface model, and then using the model to register a second set of denser data acquisition. This second set of data is used to create a more accurate, motion-corrected model of the cornea, from which pachymetry maps, keratometric values, and corneal power information can be generated. In addition, methods are presented for determining simulated keratometry values from optical coherence tomography data, and for better tracking and registration by using both rotation about three axes and the corneal apex.

Abstract: This invention discloses a media substrate for incorporation into ophthalmic lenses that has been formed by the stacking of multiple functionalized layers. Additionally, methods and apparatus for providing a stacked functional layer insert for incorporation into an ophthalmic lens are also provided. In some embodiments, an ophthalmic lens is cast molded from a silicone hydrogel and the lens includes at least one stacked functional layer insert portion.

Abstract: An optical lens 11, which has a lens section with a refractive power, has concave marks 33, 35, 37, and 39 which are formed to be recessed on a surface of the lens section, in an effective optical lens surface which contributes to image forming of the lens section. A width of each of these concave marks 33, 35, 37, and 39 is equal to or greater than 0.05 ?m and equal to or less than 14 ?m, and a depth of recession of each concave mark is equal to or greater than 0.05 ?m and equal to or less than 5 ?m.

Abstract: An image forming lens is formed by sequentially arranging, from an object side to an image side, a first lens group having positive power, an aperture stop, a second lens group having positive power, and a third lens group having positive power. The image forming lens satisfies following conditional expressions: 0.95<f12/f<1.2, 0.0<f/f3<0.2, ?0.5<(R142+R211)/(R142?R211)<?0.2, where f is a focal length of an entire system, f12 is a composite focal length of the first lens group and the second lens group, f3 is a focal length of the third lens group, R142 is a curvature radius of an image-side surface of the negative lens closest to the image side in the first lens group, and R211 is a curvature radius of object-side surface of the negative lens closest to the object side in the second lens group.

Abstract: An adaptive optical apparatus includes: a correction unit configured to correct a wavefront aberration of an eye to be examined; a detection unit configured to detect that an eyelid of the eye to be examined is closed or the eyelid of the eye to be examined is open, by using return light from the eye to be examined irradiated by measurement light; and a control unit configured to control the correction unit according to a detection result from the detection unit.

Abstract: The present invention provides an ophthalmological apparatus capable of displaying a plurality of fundus tomographic images. A photographing apparatus includes a fundus imaging unit adapted to capture a fundus image of a subject's eye, a scanning unit adapted to scan a desired position of the fundus of the subject's eye to capture tomographic images of the subject's eye, a measuring unit adapted to measure movement amounts of the fundus of the subject's eye by performing pattern matching between a plurality of feature points in the acquired fundus image and feature points in another fundus image newly acquired at a different time, and a control unit adapted to control the scanning unit based on the measured movement amounts.

Abstract: A wide angle lens may include a first lens having a negative power with a convex surface on an object side and a concave surface on an image side, a second lens having a negative power with a concave surface on the image side, a third lens having a positive power with a convex surface on the image side, a fourth lens having a positive power with a convex surface on the image side, a fifth lens being a plastic lens with a negative power with a concave surface on the object side and a concave surface on the image side, a sixth lens being a plastic lens with a positive power with a convex surface on the object side and a convex surface on the image side, and a diaphragm disposed between the third and fourth lenses. The fifth and sixth lenses constitute a cemented lens.

Abstract: Techniques and mechanisms for providing an eye-mountable device including an accommodation actuator. In an embodiment, fabrication of the eye-mountable device includes sealing layers of enclosure material to form a lens enclosure comprising a pinch-off region where the layers of enclosure material physically contact one another. The accommodation actuator includes a liquid crystal layer disposed between the layers of enclosure material in a central region around which the pinch-off region extends. In another embodiment, electrodes are disposed in the central region each between the liquid crystal layer and a respective one of the layers of enclosure material. The liquid crystal layer isolates the electrodes from one another in the central region.

Abstract: Method for determining the values of a set of n optical parameters (P1, P2, . . . , Pn) of an ophthalmic lens, n being an integer greater than or equal to 1, the method comprising: an nominal ophthalmic lens data providing step, an ophthalmic lens providing step, an optical surface measuring step, a surface errors determining step during which a set of m surface error parameters (?1, ?2, . . .

Abstract: A zoom lens unit includes, in order from an object side to an image side, a first lens group having positive refractive power and a focus function, a second lens group having negative refractive power, which moves when changing a magnification, a third lens group which moves when changing a magnification, and a fourth lens group having positive refractive power, which is fixed when changing a magnification, wherein the following condition (1) is fulfilled: |M2W·M3W·M4W|<0.14??(1) where M2W represents an imaging magnification of the second lens group at a wide-angle end, M3W represents an imaging magnification of the third lens group at the wide-angle end, and M4W represents an imaging magnification of the fourth lens group at the wide-angle end.