Abstract: The present invention provides a camera optical lens including, sequentially from an object side to an image side: a first lens having a positive refractive power; a second lens having a negative refractive power; a third lens having a negative refractive power; a fourth lens having a positive refractive power; a fifth lens having a positive refractive power; and a sixth lens having a negative refractive power. The camera optical lens satisfies following conditions: 1.00?d4/d6?2.50; ?5.00?R6/R11??3.20; 22.00?R7/d7?33.00; and ?2.00?f3/f4??1.20. The camera optical lens can achieve high optical performance while satisfying design requirements for ultra-thin, wide-angle lenses having large apertures.

Abstract: Eyewear configured to retain a hat on a wearer's head is described herein. In one aspect, eyewear includes spectacles configured to be worn over eyes of a wearer. The eyewear also includes an elastic headband configured to fit around a head of the wearer. The elastic headband is attached to the spectacles. The eyewear includes two or more headgear retention devices attached to the headband and configured to be removably attached to a hat when the hat is worn on the head of the wearer and the headband is worn around the head of the wearer.

Abstract: A lens with a fixed focal length includes five lens-element groups, a first front lens-element group, a second lens-element group, a third lens-element group, a fourth lens-element group, and a fifth back lens-element group is arranged in a stationary manner. Relative to an imaging plane in a lens barrel and both the focusing front group and the focusing back group are movable jointly relative to one another and to the lens-element groups arranged in a stationary manner in order to focus the lens on objects at different object distances.

Abstract: Implementation of a patient display in ophthalmic procedures, such as diagnostics and surgery, is disclosed herein. In an exemplary aspect, the present disclosure may be directed to an ophthalmic system. The ophthalmic system may include a patient display, a medical device, a memory, and a processor. The memory may be configured to store one or more video files that include information for a patient relating to the medical device. The processor may be configured to execute instructions to perform the following steps: receive input from an operator of a selection of at least one of the one or more video files; and display the selected at least one of the one or more video files on the patient display.

Abstract: A lens with a fixed focal length, includes five lens-element groups, a first front lens-element group, a second lens-element group, a third lens-element group, a fourth lens-element group, and a fifth back lens-element group that is arranged in a stationary manner. Relative to an imaging plane in a lens barrel and both the focusing front group and the focusing back group are movable jointly relative to one another and to the lens-element groups arranged in a stationary manner in order to focus the lens on objects at different object distances. The front lens-element group and the back lens-element group have a negative refractive power.

Abstract: An eye-mountable device (EMD) includes a lens enclosure, liquid crystal material, first and second electrodes, a substrate, and a controller. The lens enclosure includes a first encapsulation layer and a second encapsulation layer sealed to the first encapsulation layer. The liquid crystal material is disposed across a central region of the lens enclosure. The first electrode is disposed within the lens enclosure between the first encapsulation layer and the liquid crystal material. The second electrode is disposed within the lens enclosure between the second encapsulation layer and the liquid crystal material. The substrate is disposed within the EMD. The controller is disposed on the substrate and electrically coupled to the first and second electrodes to apply a voltage across the liquid crystal material.

Abstract: This invention relates to an optical article comprising a transparent substrate coated with an antireflective coating comprising at least two layers having a low refractive index, and at least two layers having a high refractive index, one layer having a high refractive index being the nearest from said substrate, characterized in that the total physical thickness of said antireflective coating is equal to or lower than 600 nm, and such that: —the mean reflection factor in the near infrared region is higher than or equal to 20% at an angle of incidence lower than 35°, and —the mean reflection factor RmB of blue light at a wavelength ranging from 420 to 450 nm is higher than or equal to 7.0% at an angle of incidence lower than 15°.

Abstract: A lens with a fixed focal length comprising including a first front lens-element group, a second lens-element group, a third lens-element group, a fourth lens-element group, and a fifth back lens-element group. Relative to an imaging plane in a lens barrel and both the focusing front group and the focusing back group are movable jointly relative to one another and to the lens-element groups arranged in a stationary manner in order to focus the lens on objects at different object distances. The front lens-element group has a positive refractive power and the central group and the back lens-element group have a negative refractive power.

Abstract: The present application provides a telephoto lens assembly, the telephoto lens assembly includes a first lens, a second lens, a third lens, a fourth lens, and at least one subsequent lens, provided sequentially from an object side to an image side along an optical axis, the first lens has a positive focal power, an object side surface of the first lens is a convex surface, and an axial distance from the object side surface of the first lens to an image plane TTL and a total effective focal length f of the telephoto lens assembly satisfy: TTL/f?1.0, and the fourth lens has a positive focal power, an effective focal length of the first lens f1, an effective focal length of the fourth lens f4 and the total effective focal length f satisfy: 1<|f/f1|+|f/f4|?2.7.

Abstract: An imaging lens system comprises, in order from an object side to an image side: a first lens element with positive refractive power having a convex object-side surface; a second lens element with refractive power; a third lens element with refractive power having object-side and image-side surfaces being aspheric, at least one surface thereof having at least one inflection point; a fourth lens element with refractive power having a concave object-side surface and a convex image-side surface; a fifth lens element with refractive power having an aspheric object-side surface and an aspheric concave image-side surface, the image-side surface thereof having at least one inflection point.

Abstract: An optical lens in order from an object side to an image-forming side includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. An object-side surface of the first lens has a curvature radius R1, an image-side surface of the first lens has a curvature radius R2, an object-side surface of the third lens has a curvature radius R5, an image-side surface of the third lens has a curvature radius R6, an image-side surface of the seventh lens has an inflection point, a distance between the inflection point and an optical axis is h14, and the seventh lens has a radius H14. The optical lens satisfies at least one of the following conditions: 0.01?|R2/R1|; |R2/R1|?0.6; 0?|R5/R6|; |R5/R6|?2; 0.3?|h14/H14|; and |h14/H14|?0.9.

Abstract: According to a method for determining metamorphopsia based on user interaction disclosed as an embodiment of the present invention, a test chart may be displayed to a user, an input from the user for a part which is perceived as being distorted in the displayed test chart may be received, and a metamorphopsia degree of the user may be accurately determined based on a distortion area selected according to the received input. Further, according to another embodiment of the present invention, a test chart may be displayed to a user, a response (e.g., distance values of points, an area value, etc. in a zone) for each zone for the test chart may be received from the user, and metamorphopsia of the user may be determined based on the received response.

Abstract: The present disclosure provides a dual-molded circular optical element including an outer plastic peripheral portion and an inner sheet portion. The outer plastic peripheral portion locates at an outer annular surface of the circular optical element. The inner sheet portion is enclosed in the outer plastic peripheral portion, and the inner sheet portion forms a minimal central opening of the circular optical element. Two sides of the outer plastic peripheral portion are disposed with a flat plane, and each of the flat planes is perpendicular to a central axis of the circular optical element.

Abstract: In certain embodiments, an ophthalmic diagnostic system includes a laser source, a galvanometer, and a system inverting controller (SIC) coupled to the galvanometer. The galvanometer includes one or more optical elements and one or more galvanometer controllers configured to manipulate an orientation of the one or more optical elements to scan the output of the laser source across an ophthalmic target based on galvanometer control signals. The system inverting controller (SIC) is configured to modify input galvanometer control signals based on an estimated transfer function of the galvanometer and provide the modified galvanometer control signals to the galvanometer.

Abstract: Eyewear includes a frame configured to support an optical element and a temple pivotably connected to one side of the frame by a hinge. The temple is movable with respect to the frame between folded and unfolded configurations. A first permanent magnet is either disposed on or at least partially embedded within the frame at a location adjacent the hinge. A second permanent magnet (or ferromagnetic member) is either disposed on or at least partially embedded within the temple at a location adjacent the hinge. The permanent magnets are attracted to each other such that magnetic attraction retains the temple in the unfolded configuration when the temple is moved into the unfolded configuration.

Abstract: A lens element adapted for a person including a holder including a refraction area having a refractive power based on a prescription for correcting an abnormal refraction of the person, a plurality of optical elements placed on at least one surface of the holder to at least one of: slow down, retard, or prevent a progress of the abnormal refraction of an eye of the person, and at least one layer of at least one coating element covering at least a zone of at least one optical element and at least a zone of the holder on which the optical elements are placed, wherein said at least one layer of at least one coating element adds an optical power of 0.1 diopter in absolute value in specific wearing conditions when measured over said zone of the optical element covered by said at least one layer of at least one coating element.

Abstract: The presently disclosed subject matter includes a mobile electronic comprising an integrated camera, comprising a Wide camera unit comprising a Wide lens unit, and a Telephoto camera unit comprising a telephoto lens unit, the telephoto lens unit and the wide lens unit having respectively TTL/EFL ratios smaller and larger than 1 and defining separate telephoto and wide optical paths.

Abstract: An apparatus, and corresponding method, for determining a refractive property of an eye includes a housing with a port configured to receive an eye and also light from the eye. A tunable lens can be mounted to the housing to apply a variable focal power to the light from the eye and to pass the light along an optical path toward a wavefront sensor within the housing. The wavefront sensor can receive the light via the optical path and measure a wavefront thereof. A determination module can be configured to determine a property of the eye based on the wavefront. Embodiments can be handheld, portable, and open view, while providing objective wavefront aberrometry, subjective phoroptry, and accommodation and presbyoptic evaluation, as well as lensometry functions.

Abstract: An optical imaging lens assembly includes, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element. The first lens element has positive refractive power. The second lens element has positive refractive power. The third lens element has negative refractive power. The fourth lens element has an object-side surface and an image-side surface being aspheric. The fifth lens element has an object-side surface and an image-side surface being aspheric. The sixth lens element has an object-side surface and an image-side surface being aspheric, wherein at least one of the object-side surface and the image-side surface of the sixth lens element includes at least one inflection point.

Abstract: Methods and systems relating generally to information displays, and more particularly to systems and methods for backlight assemblies for information displays that emit an angularly narrow cone of light. A backlight assembly that emits a narrow angular cone of light can be particularly beneficial in a head-mounted display configuration, such as for use as part of virtual reality or augmented reality systems, where the head-mounted display comprises a lens assembly that directs light from an information display to the eyes of the user. Such a backlight assembly configuration may help reduce undesirable visual effects like flood illumination, ghost images, glare, and scattering.