Abstract: A removable lens stack includes a base layer, a first removable lens layer, and a second removable lens layer. The base layer may include a substrate and a moth eye coating. The first removable lens layer may include a substrate, a single or multi-layer interference antireflective coating on a first side of the substrate, and a fluoropolymer coating on a second side of the substrate. The first removable lens layer may be stacked on top of the base layer with the fluoropolymer coating being molded to fit the moth eye coating. The second and any subsequent removable lens layer may include a substrate, a single or multi-layer interference antireflective coating on a first side of the substrate, and an acrylic or polyurethane adhesive on a second side of the substrate. The second removable lens layer may be stacked on top of the first removable lens layer and so on.

Abstract: Present embodiments provide for optical imaging lenses. An optical imaging lens may include at least seven lens elements positioned sequentially from an object side to an image side. Through arrangement of the convex or concave surfaces of the lens elements, the length of the optical imaging lens may be shortened while providing better optical characteristics and imaging quality.

Abstract: A removable lens stack includes a base layer and one or more removable lens layers. The base layer may include a substrate and moth eye coatings on first and second sides of the substrate. A first removable lens layer may include a substrate and an acrylic or fluoropolymer coating on a first side of the substrate and may be stacked on top of the base layer such that the second side of the substrate faces the first side of the substrate of the base layer. A second removable lens layer may include a substrate and an acrylic or fluoropolymer coating on a first side of the substrate and may be stacked on top of the first removable lens layer such that the second side of the substrate faces the first side of the substrate of the first removable lens layer. The acrylic or fluoropolymer coating may comprise a hard coat.

Abstract: The present invention provides a composition for forming a hard coat layer, which is capable of forming a hard coat layer that exhibits excellent adhesion to an adjacent layer, while having excellent hardness. A composition for forming a hard coat layer according to the present invention contains: a (meth)acrylate which has at least one group that is selected from the group consisting of a phosphoric acid group and a sulfonic acid group; a silsequioxane which has a radically polymerizable group; and metal oxide particles.

Abstract: Methods and devices to identify contact lens wearers predisposed to contact lens discomfort are described. The methods and devices involve obtaining a tear film sample from a person and determining an amount of interleukin-17A present in the tear film sample.

Abstract: The imaging lens consists of, in order from an object side, a first lens group having a negative refractive power, a second lens group having a positive refractive power, and a third lens group having a negative refractive power, and is configured such that, during focusing, the first lens group and the third lens group remain stationary with respect to an image plane, the second lens group moves in the direction of an optical axis, the first lens group includes a first-a negative lens and a first-b negative lens successively in order from a position closest to the object side, and that the second lens group includes an aperture stop that moves integrally with the second lens group during focusing.

Abstract: A removable lens stack includes a base layer, a first removable lens layer, and a second removable lens layer. The base layer may include a substrate and a moth eye coating. The first removable lens layer may include a substrate, a single or multi-layer interference antireflective coating on a first side of the substrate, and a fluoropolymer coating on a second side of the substrate. The first removable lens layer may be stacked on top of the base layer with the fluoropolymer coating being molded to fit the moth eye coating. The second and any subsequent removable lens layer may include a substrate, a single or multi-layer interference antireflective coating on a first side of the substrate, and an acrylic or polyurethane adhesive on a second side of the substrate. The second removable lens layer may be stacked on top of the first removable lens layer and so on.

Abstract: A shutter installation for an optical beam path includes: a shutter element for shutting the optical beam path; a drive for moving the shutter element in a controlled manner along a displacement path between two terminal positions; and at least one detent block having in each case a detent face against which the shutter element in one of the terminal positions is in each case moved, or able to be moved, respectively. Each detent block is configured so as to be displaceable such that the respective detent block, by the shutter element, is able to be displaced from the terminal position of the detent block by a distance along a displacement path.

Abstract: An optical apparatus includes a first driver configured to move a focus lens in an optical axis direction, a second driver configured to move a first driver in the optical axis direction, and a controller configured to control driving of the first driver according to a moving amount of the first driver by the second driver.

Abstract: Controllers and control methods apply a drive voltage to bus bars of a thin film optically switchable device. The applied drive voltage is provided at a level that drives a transition over the entire surface of the optically switchable device but does not damage or degrade the device. This applied voltage produces an effective voltage at all locations on the face of the device that is within a bracketed range. The upper bound of this range is associated with a voltage safely below the level at which the device may experience damage or degradation impacting its performance in the short term or the long term. At the lower boundary of this range is an effective voltage at which the transition between optical states of the device occurs relatively rapidly. The level of voltage applied between the bus bars is significantly greater than the maximum value of the effective voltage within the bracketed range.

Abstract: A wearable eyewear device, methods of use and systems are described that allow a person wearing the eyewear device to accurately measure the intraocular pressure of their eye, and dispense a medication to the eye when needed.

Abstract: An ophthalmic surgical system includes a robotic arm disposed above a patient's eye. A positioning camera is disposed on the robotic arm and positioned to visualize the patient's eye. A processor is electrically coupled to the positioning camera. The processor is configured to receive an indication of a position of the robotic arm relative to a fixed datum, determine a focal length between the positioning camera and the patient's eye, compare the focal length to the position of the robotic arm, and determine a patient eye level relative to the fixed datum.

Abstract: A diving mask (1) comprising a rigid frame (101), at least one lens (102, 103), and a face mask (104) made of soft and elastically yielding material fixed to the rigid frame (101), where the face mask (104) has at least one opening (106, 107) for positioning at least one lens (102, 103), a front hollow projection (112) for housing the nose of the diver and a rear perimeter profile (105) applicable sealingly to the face of the diver so as to delimit an internal space (113) between said mask (1) and the face of the diver adapted to contain the nose and eyes of the diver, where the face mask (104) has a means for cooling the damp air exhaled from the nose of the diver for the dehumidification thereof before reaching the at least one lens (102, 103).

Abstract: A system includes an electronic contact lens that obtains sensor measurements from integrated motion sensors or other types of sensors and a processing module that estimates a mental state of an individual based on the sensor measurements. The processing module identifies patterns of eye movements and analyzes how these patterns change over time. Based on anatomical relationships between eye movement and mental state, the processing module estimates characteristics of the individual such as fatigue, intoxication, injury, or a medical condition that have known effects on eye movement patterns. The electronic contact lens system generates an output indicative of the estimated mental state to alert the individual to the detected condition or to initiate an automated action.

Abstract: An optical imaging lens includes six lens elements. The object-side surface of the first lens element has a convex part in a vicinity of the periphery of the first lens element, the image-side surface of the second lens element has a concave part in a vicinity of the periphery of the first lens element, the object-side surface of the third lens element has a convex part in a vicinity of the optical axis, the image-side surface of the fourth lens element has a convex part in a vicinity of the periphery of the fourth lens element, the image-side surface of the fifth lens element has a concave part in a vicinity of the optical axis, and the sixth lens element has negative refractive power.

Abstract: A removable lens for glasses includes an electrochromic layer adapted to transition between at least two states of a transparency level dependent on an electrical condition applied to the electrochromatic layer and an electrical connection element physically adapted to make an electrical connection with the electrochromic layer, wherein the electrical connection element is positioned to align with a variable-power electrode mounted on the glasses such that, when the removable lens is mounted on the glasses, the variable-power electrode and the electrical connection element make the electrical connection between the variable-power electrode and an electrically conductive layer of the electrochromic layer.

Abstract: A filter assembly is configured to optically couple a camera head to an endoscope. The filter assembly includes a first end adapted to be removably coupled to the camera head and a second end opposite and spaced apart from the first end, the second end adapted to be removably coupled to the endoscope. The filter assembly includes an optic housing disposed between the first end and the second end, the optic housing includes an optical path length maximizer and a first window. The first window has a first surface that is angled with respect to a plane that is perpendicular to a longitudinal axis of the optic housing so as to minimize a narcissus reflection within the optic housing and an optical filter to reject laser irradiation.

Abstract: A collimator lens is held by a holder so that, while viewing the collimator lens in an axial direction of a plurality of beams passing through the collimator lens, a straight line connecting between a center of the collimator lens and a gate portion is substantially parallel or substantially orthogonal to a straight line connecting between centers of the plurality of beams transmitting through the collimator lens.

Abstract: Systems and method for multiplexing and alternating light of different wavelengths in an ophthalmoscope are disclosed herein. According to an aspect, an imaging system includes an illumination system configured to generate and output light that alternates between at least two different wavelengths. The imaging system includes a multiplexer configured to receive the output light and to multiplex the light of different wavelengths onto a single optical channel. Further, the imaging system includes a scanning laser ophthalmoscope probe configured to operatively receive the multiplexed light, to apply the multiplexed light to a subject for imaging, and to receive light returning from the subject for generating an image of the subject.

Abstract: This application provides a zoom assembly, including a first refraction component and a first lens apparatus. The first refraction component is configured to change a transmission path of light, and the first refraction component includes a first surface, a second surface, a third surface, and a first reflection structure. The three surfaces of the first refraction component are all transmission surfaces. An optical axis of the first lens apparatus is perpendicular to the second surface of the first refraction component. The first reflection structure is attached to the third surface, and is configured to receive light transmitted by one of the transmission surfaces and reflect the light to another transmission surface.