Apparatuses or methods for determining a refractive error of an eye are disclosed. An intensity of light coming from an eye is measured, using a detector device, through at least two or at least three different apertures of the aperture device. The refractive error is then calculated based on the measured intensities.

Disclosed herein are methods and apparatus for making a determination about a cataract in an eye in ambient lighting conditions.

A head mounted display includes a display layer, an array of light sources, a first optical combiner, and a second optical combiner. The array of light sources are configured to be selectively enabled to emit non-visible light to illuminate a fundus of an eye. The first optical combiner is configured to receive reflected non-visible light that is reflected by the eye, direct a first component of the reflected non-visible light to a first camera to generate an image of the eye, and pass a second component of the reflected non-visible light. The second optical combiner is configured to receive a fundus imaging light responsive to the second component of the reflected non-visible light, and to direct the fundus imaging light to a second camera to generate an image of the fundus.

A method and system perform an ophthalmic procedure on an eye having an optical path from the lens to the retina. An image of at least part of the eye is received in a data processing unit. The image includes the optical path. The data processing unit determines keep out zone(s) and identifies undesirable feature(s) based on the image. The keep out zone(s) include the retina. The data processing unit also selects one of the undesirable feature(s) for removal. At least part of the undesirable feature is outside of the keep out zone(s). Confirmation for removal of the undesirable feature is received in the data processing unit. In response to receiving the confirmation, a control unit controls a laser to perform laser removal the at least the portion of the undesirable feature without targeting any portion of the keep out zone(s).

A system to perform remote oculography includes light-occluding goggles configured to be worn by a patient. The light-occluding goggles include an infrared camera positioned to capture one or more first images of a first eye of the patient. The light-occluding goggles also include a display positioned such that it is viewable by a second eye of the patient. The display is configured to display a pattern for the patient to view. The light-occluding goggles also include a sensor configured to detect information regarding a position of a head of the patient. The system also includes a visible light camera configured to capture one or more second images of the patient as the patient wears the light-occluding goggles.

Apparatus and methods are described including illumination equipment (300) configured to direct light into an eye of a subject. An optical device (100) is placed inside the subjects eye, the optical device including a Fabry Perot interferometer (106) comprising at least two mirrors (162, 164), the Fabry Perot interferometer (106) being configured such that a distance between the mirrors (162, 164) varies as an intraocular parameter of the subjects eye varies. A retroreflector (140) is configured such that light that is transmitted through the Fabry Perot interferometer (106) is automatically reflected out of the subjects eye. Readout equipment (400) is configured to detect the light that is reflected out of the subjects eye. Other applications are also described.

Improved optical coherence tomography systems and methods to measure thickness of the retina are presented. The systems may be compact, handheld, provide in-home monitoring, allow the patient to measure himself or herself, and be robust enough to be dropped while still measuring the retina reliably.

Systems and methods are disclosed for evaluating human eye tracking. One method includes receiving data representing the location of and/or information tracked by an individual's eye or eyes before, during, or after the individual performs a task; identifying a temporal phase or a biomechanical phase of the task performed by the individual; identifying a visual cue in the identified temporal phase or biomechanical phase; and scoring the tracking of the individual's eye or eyes by comparing the data to the visual cue.

A system and method are provided for obtaining a pupil response profile for a subject. The method include: obtaining scan data as frames of a pupil response over time prior to, during and after exposure to a flash of a light source; locating a candidate pupil to be measured from the scan data; image processing the scan data to obtain a set of pupil candidate measurements to generate a graph of pupil measurements against time; filtering the graph to produce a final set of pupil measurements forming a pupil response profile. The method may also include: measuring profile parameters from the pupil response profile; and using the profile parameters to determine aspects of the pupil response.

An optical device can include: an incident light polarizer positioned to receive incident light and configured to polarize incident light such that polarized incident light is directed to a cornea of a subject; at least one corneal light polarizer, wherein the at least one corneal light polarizer is positioned to receive reflected light from the cornea of the subject and polarize the reflected light to a second polarization; at least one rotating mechanism; and at least one receiver. The receiver can be at least one viewing port optically coupled with the at least one corneal light polarizer or an imaging device (e.g., optical detector). The at least one rotating mechanism is: coupled with the incident light polarizer; coupled with the at least one corneal light polarizer; or coupled with the incident light polarizer and the at least one corneal light polarizer.