Abstract: Methods and systems am disclosed in which an optical diagnosis of an eye's optical image quality is performed using a simulated retinal image. An objective measurement of a total wave aberration is obtained, and residual aberrations are computed by subtracting a sphero-cylindrical correction from the total wave aberration. The simulated retinal image is computed by computing a point-spread function from the residual aberrations and convolving the computed point-spread function with an acuity chart. The optical diagnosis includes at least one of: determining excess aberrations, ranking optics of the eye into optical grades, selecting the eye for high-definition eyeglasses, identifying amblyopia or macular diseases, or choosing an objective refraction for vision correction.

Abstract: An ophthalmic photographing apparatus enables easy detection of a pupil diameter. The ophthalmic photographing apparatus is provided with an anterior ocular segment illumination unit for illuminating an anterior ocular segment of a subject eye with invisible light, an imaging element that is sensitive to at least invisible light and captures an image of the subject eye, and a processing unit for processing the image captured by the imaging element. When an image of an index projected onto the anterior ocular segment satisfies a predetermined condition, the processing unit starts detection of a pupil diameter of the subject eye by using the image on the imaging element formed by invisible light reflected from the anterior ocular segment.

Abstract: This disclosure relates generally to a method and system for assessment of sustained visual attention of a target. The conventional methods utilize various markers for assessment of attention, however, blink rate variability (BRV) series signal is not explored yet. In an embodiment, the disclosed method utilizes BRV series signal for assessing sustained visual attention of a target. A gaze data of the target is recorded using an eye tracker and a set of uniformly sampled BRV series signal is reconstructed from each of the BRV series. One or more frequency domain features, including pareto frequency, are extracted from the set of uniformly sampled BRV series signal. The values of frequency domain features extracted from the set of BRV series signals are compared with corresponding threshold values to determine visual sustained attention of the target.

Abstract: A system for guiding an ophthalmic procedure is disclosed. The system includes a housing assembly with a head unit configured to be at least partially directed towards a target site in an eye. An optical coherence tomography (OCT) module and stereoscopic visualization camera are at least partially located in the head unit and configured to obtain a first set and a second set of volumetric data, respectively. A controller is configured to register the first set and second set of volumetric data to create a third set of registered volumetric data. The third set and second set of registered volumetric data are rendered, via a volumetric render module, to a first and second region. The first region and the second region are overlaid to obtain a shared composite view of the target site. The controller is configured to extract structural features and/or enable visualization of the target site.

Abstract: An alignment means of a measurement instrument includes a housing an optical component having a principal axis in a direction parallel to a desired alignment; a first light source positioned at a first distance S1 from the optical component and at a first height h1 from the principle axis; a second light source positioned at a second distance S2 from the optical component and at a second height h2 from the principle axis; and an angle barrier means arranged between the optical component, and the first and second light sources. The housing, the optical component, and the angle barrier means are arranged to block visibility of the first light source along the principal axis at a distance superior to d1?; and block visibility of the second light source along the principal axis at a distance smaller than d2, wherein d2 is smaller than d1?.

Abstract: A method comprises: disposing a physical landmark upon an eye of a user; capturing at least one image of the eye of the user with an image sensor while the eye is illuminated, wherein the image includes an image of the physical landmark and at least one other point on the surface of the eye outside of the cornea; processing the at least one image to obtain at least one metric of the eye of the user; and determining, based on the at least one metric, at least one parameter of a daily use contact lens to be worn on the eye of the user.

Abstract: In an ophthalmology system, an right-eye imaged image is displayed on a display section for presentation to an observer through an optical unit and a reflection member. A left-eye imaged image is also displayed on a display section for presentation to an observer through an optical unit and a reflection member. A separation between the left and right imaged images is made wider than a spacing between the left and right optical units. This enables image presentation with the optical axes for the observer viewing the images intersecting in front so as to cause a convergence angle to arise.

Abstract: An OCT system for measuring a retina as part of an eye health monitoring and diagnosis system. The OCT system includes an OCT interferometer, where the interferometer comprises a light source or measurement beam and a scanner for moving the beam on the retina of a patient's eye, and a processor configured to execute instructions to cause the scanner to move the measurement beam on the retina in a scan pattern. Measurement data may be processed using a decurving process to enhance the resolution of the ILM layer and provide improved determinations of retinal thickness.

Abstract: A window operable to separate an interior from an exterior is disclosed. The window comprises a pressure pane and an anti-condensation assembly. The anti-condensation assembly is disposed in an interior direction relative the pressure pane. Further, the anti-condensation assembly comprises a substantially transparent substrate disposed in a spaced apart relationship relative the pressure pane. Additionally, the anti-condensation assembly comprises a resistively heatable layer associated with the first substrate. The resistively heatable layer is operable to generate heat when an electrical current is applied thereto. Accordingly, application of power to the resistively heatable layer may serve to reduce or eliminate the presence of visible condensation in the window.

Abstract: Laser-Speckle Contrast imaging apparatus configured to assess and quantify motion associated with an object and, in a specific case of an eye—retinal vascular anatomy and hemodynamics and generate substantially contrast-free maps of retinal blood flow over a wide field-of-view at up to 590 fps and under short exposure durations (>50 ?s), is applicable for diagnosis, study, and management of neurodegenerative conditions (i.e. mild cognitive impairment and Alzheimer's disease) and systemic cardiovascular diseases (i.e. athero- and arteriosclerosis, coronary artery occlusion, and hypertension). The apparatus employs a) a set of apertures substantially blocking light, delivered from a source of light to an illumination arm of the apparatus, from impinging onto an axial point of the front surface of the lens of the illumination arm, and b) polarization gating between the illumination and light-collecting arms of the apparatus.

Abstract: A device for visualizing an irido-corneal angle of an eye through a window of a patient interface configured to be placed on the eye includes and optics structure and at least one imaging apparatus. The optics structure is configured to engage with the patient interface to provide a line of sight through the window in the direction of the irido-corneal angle, and to subsequently disengage from the patient interface. The imaging apparatus is associated with the optics structure and aligned with the line of sight to enable capturing an image of the eye including the irido-corneal angle.

Abstract: Introduced here are retinal cameras having one or more optical components whose position can be modified so that the left and right eyes can be imaged during a single imaging operation. Collectively, the optical component(s) may be referred to as an “optical assembly.” An optical assembly can include the objective lens, lens tube, and other optical components such as mirror(s), light source(s), capturing medium(s), etc. An optical assembly of a retinal camera may be movable between a first position and a second position along an arcuate path. By moving the optical assembly between the first and second positions along the arcuate path, the retinal camera can align the lens tube with the left and right eyes of an individual while clearing her nose. Thus, the retinal camera may generate images of the left and right eyes during an imaging procedure without requiring that the individual move her head.

Abstract: System and method for imaging a target site with a housing assembly having a head unit configured to be at least partially directed towards the target site. An optical coherence tomography (OCT) module and stereoscopic visualization camera are at least partially located in the head unit and configured to obtain a first set and a second of volumetric data of the target site, respectively. A controller is configured to register the first set of volumetric data with the second set of volumetric data to create a third set of registered volumetric data. The third set of registered volumetric data and second set of volumetric data are rendered, via a volumetric render module, to a first and second region. The first region and the second region are overlaid to obtain a composite shared view of the target.

Abstract: Apparatus and methods are described for calibrating an optical system that is used for measuring optical properties of a portion of a subjects body. During a calibration stage, a front surface of a calibration object (300) is illuminated, light reflected from a plurality of points on the calibration object (300) is detected, and intensities of the light reflected from the plurality of points on the calibration object (300) are measured. During a measurement stage, the portion of the subjects body is illuminated, and light reflected from the portion of the subjects body is detected. Measurements performed upon the light that was reflected from the portion of the subjects body are calibrated, using the measured intensities of the light reflected from the plurality of points on the calibration object (300). Other applications are also described.

Abstract: An imaging system for an ophthalmic laser system includes a prism cone made of a transparent optical material and disposed downstream of the focusing objective lens of the ophthalmic laser system, the prism cone having an upper surface, a lower surface parallel to the upper surface, a tapered side surface between the upper and lower surfaces, and a beveled surface formed at an upper edge of the prism cone and intersecting the upper surface and the side surface, and a camera disposed adjacent to the prism cone and facing the beveled surface. The camera is disposed to directly receive light that enters the lower surface of the prism cone and exits the beveled surface without having been reflected by any surface.

Abstract: Generating an aspheric contact lens design for facilitating myopia control of a cornea of a patient includes operations of: obtain measurement for degree refractive error of the eye in diopters; obtain measurement of one or more biomechanical properties of the cornea; define a diameter of a central zone of the contact lens based on pupil size; select a base curve profile and width for the central zone based on the refractive error and the one or more biomechanical properties; define a width of a reverse zone adjacent to and encircling the central zone, the width being greater than 0.

Abstract: Techniques are disclosed for systems and methods to provide improved ocular aberrometry. An ocular aberrometry system includes a wavefront sensor configured to provide wavefront sensor data associated with an optical target monitored by the ocular aberrometry system and a logic device configured to communicate with the wavefront sensor. The logic device is configured to determine a complex analysis engine for the ocular aberrometry system based, at least in part, on an aberrometer model and/or an eye model associated with the ocular aberrometry system, wherein the aberrometer model and the eye model are based, at least in part, on wavefront sensor data provided by the wavefront sensor. The logic device is also configured to generate a compact analysis engine for the ocular aberrometry system based, at least in part, on the determined complex analysis engine.

Abstract: Apparatuses and methods for determining a refractive error of an eye are disclosed. A series of images of light coming from an eye are captured with varying optical powers, and the refractive error is then calculated based directly on the series of images used as approximate point spread functions. The calculation includes determining a modulation transfer area as a function of meridian angle and optical power in an angle range from 0° to 180° based on the series of images, and to calculate the refractive error based on the modulation transfer area as a function of angle and optical power.

Abstract: Systems and methods for determining a compatibility between a multi-focal contact lens and a patient seeking presbyopia vision correction include receiving, from a first device associated with a first eye-care professional (ECP), a request for selecting a contact lens for a consumer, wherein the request comprises biometric information associated with the consumer; obtaining a performance metric associated with the first ECP; determining, using the machine learning model and based on the performance metric, a customized compatibility index indicating a compatibility between a particular contact lens and the consumer for the first ECP; and presenting a report indicating the compatibility index on the first device. Additional systems, methods, and non-transitory machine-readable mediums are also provided.

Abstract: Various implementations disclosed herein relate to systems, methods, and devices to facilitate mass vision screening of individuals. An example method includes capturing a first image of an individual and confirming an identity of the individual based on the first image. In response to confirming the identity of the individual, the method may further include capturing one or more second images of an eye of the individual; determining one or more health metrics of the individual based on the one or more second images, and transmitting, to a remote device, the identity of the individual and the one or more health metrics of the individual. The one or more health metrics may include at least one of a pupillary distance of the individual, a pupil size of the eye of the individual, a complete refraction of the eye of the individual, or an alignment indicator of the eye of the individual.