An electronic device may include a display and control circuitry that operates the display. The control circuitry may be configured to daltonize input images to produce daltonized output images that allow a user with color vision deficiency to see a range of detail that the user would otherwise miss. The daltonization algorithm may be specific to the type and severity of color vision deficiency that the user has. The control circuitry may conduct a color vision assessment using the display. The color vision assessment may include a sequence of test images that are each displayed for a predetermined period of time before moving to the next test image in the sequence. Each test image may include a color patch on a neutral background. A predetermined number of severity levels for each type of color vision deficiency may be tested during the color vision assessment.

The present invention is directed to a medical imaging binocular indirect ophthalmoscope with onboard sensor array and computational processing unit, enabling simultaneous or time-delayed viewing and collaborative review of photographs or videos from an eye examination. The invention also claims a method for photographing and integrating information associated with the images, videos, or other data generated from the eye examination.

In accordance with one aspect of the present invention, an optical coherence tomography-based ophthalmic testing center system includes an optical coherence tomography instrument comprising an eyepiece for receiving at least one eye of a user or subject; a light source that outputs light that is directed through the eyepiece into the user's or subject's eye, an interferometer configured to produce optical interference using light reflected from the user's/subject's eye, an optical detector disposed so as to detect said optical interference; and a processing unit coupled to the detector. The ophthalmic testing center system can be configured to perform a multitude of self-administered functional and/or structural ophthalmic tests and output the test data

A system and method for detecting a stroke includes a non-contact ocular pulse measurement device configured to output a first and a second ocular pulse measurement signals for each of a patient's eyes, respectively. A computing system has a processor and a memory, and the memory stores instructions that when executed cause the processor to analyze the first and second ocular pulse measurements. An index of difference between the first and second ocular pulse measurements is determined, and a user interface is generated that includes a stroke advisory to the patient based on the index of difference.

Illumination can be evaluated for patient using a system including a housing, an adjustable light source mechanically coupled to the housing and configured to illuminate an object for viewing by the patient on an axis substantially perpendicular to a surface of the object. A user-adjustable input coupled to the adjustable light source is to obtain information from a user indicative of a calibrated illuminance and a color property to be provided by the adjustable light source including providing a range of adjustable illuminance and color properties selectable by the user. The adjustable light source can be configured to provide light having an illuminance in excess of 300 lux, and the housing can be configured to provide a first specified distance between the adjustable light source and the object for viewing and to obstruct viewing of the light source directly by the patient.

Methods, devices, and systems are disclosed for determining refractive corrections of human eyes to reduce and eliminate image distortion associated with eyeglasses. In some embodiments, an objective refraction module is configured to measure refractive errors of an eye objectively, without subjective feedback from a tested subject. A computation module is configured to generate a plurality of objective prescriptions. A phoropter module is configured to perform a subjective refraction for determining a plurality of subjective spherical powers based on the plurality of objective prescriptions. An output module is configured to generate a plurality of prescriptions for eyeglasses, the plurality of prescriptions comprising (a) a first prescription having a first subjective spherical power f.sub.s1, a first objective cylinder power F.sub.c1, and a first objective cylinder angle F.sub.a1, and (b) a second prescription having a second subjective spherical power f.sub.s2, a second objective cylinder power F.sub.c2, and a second objective cylinder angle F.sub.a2.

A Progressive Lens Simulator comprises an Eye Tracker, for tracking an eye axis direction to determine a gaze distance, an Off-Axis Progressive Lens Simulator, for generating an Off-Axis progressive lens simulation; and an Axial Power-Distance Simulator, for simulating a progressive lens power in the eye axis direction. The Progressive Lens Simulator can alternatively include an Integrated Progressive Lens Simulator, for creating a Comprehensive Progressive Lens Simulation. The Progressive Lens Simulator can be Head-mounted. A Guided Lens Design Exploration System for the Progressive Lens Simulator can include a Progressive Lens Simulator, a Feedback-Control Interface, and a Progressive Lens Design processor, to generate a modified progressive lens simulation for the patient after a guided modification of the progressive lens design. A Deep Learning Method for an Artificial Intelligence Engine can be used for a Progressive Lens Design Processor Embodiments include a multi-station system of Progressive Lens Simulators and a Central Supervision Station.

A Progressive Lens Simulator comprises an Eye Tracker, for tracking an eye axis direction to determine a gaze distance, an Off-Axis Progressive Lens Simulator, for generating an Off-Axis progressive lens simulation; and an Axial Power-Distance Simulator, for simulating a progressive lens power in the eye axis direction. The Progressive Lens Simulator can alternatively include an Integrated Progressive Lens Simulator, for creating a Comprehensive Progressive Lens Simulation. The Progressive Lens Simulator can be Head-mounted. A Guided Lens Design Exploration System for the Progressive Lens Simulator can include a Progressive Lens Simulator, a Feedback-Control Interface, and a Progressive Lens Design processor, to generate a modified progressive lens simulation for the patient after a guided modification of the progressive lens design. A Deep Learning Method for an Artificial Intelligence Engine can be used for a Progressive Lens Design Processor. Embodiments include a multi-station system of Progressive Lens Simulators and a Central Supervision Station.

An instrument for imaging the eye and performing ophthalmic diagnostic tests is disclosed that obtain images of the structures of the eye using imaging technology such as optical coherence tomography (OCT). To assist with such imaging and/or provide additional diagnostics, the ophthalmic diagnostic instrument may additionally include a display for presenting images to the subject whose eyes and vision are being evaluated. This display system may comprise a MEMS (microelectromechanical system) scanning mirror.

Systems, devices, and methods are disclosed which may be used to detect and determine the extent of brain trauma, mental impairment, physical disability, or other brain dysfunction by tracking one or more ocular responses.