Systems and methods for assessing the visual acuity of person using a computerized consumer device are described. The approach involves determining a separation distance between a human user and the consumer device based on an image size of a physical feature of the user, instructing the user to adjust the separation between the user and the consumer device until a predetermined separation distance range is achieved, presenting a visual acuity test to the user including displaying predetermined optotypes for identification by the user, recording the user's spoken identifications of the predetermined optotypes and providing real-time feedback to the user of detection of the spoken indications by the consumer device, carrying out voice recognition on the spoken identifications to generate corresponding converted text, comparing recognized words of the converted text to permissible words corresponding to the predetermined optotypes, determining a score based on the comparison, and determining whether the person passed the visual acuity test.

A system for determining refraction features of both first and second eyes of a subject including a light field display device, a system of localization of the positions of the first and second eyes of the subject, the light field display device generating a first light field directed selectively toward the first eye, and, respectively, a second light field directed selectively toward the second eye, control circuitry that adjusts the first light field as a function of at least a first refraction parameter associated with at least a first optical aberration for the first eye and the control circuitry adjusting said second light field as a function of at least a second refraction parameter associated with at least a second optical aberration for the second eye.

A system for determining a prescription for an eye of a person, the system being configured to communicate with a mobile device including at least one first light source adapted to illuminate the eye with first light having a first optical wavelength, at least one second light source adapted to illuminate the eye with second light having a second optical wavelength different from the first wavelength, and a processor that measures the photorefraction of the eye at the first wavelength based on at least one picture of the eye recorded when illuminating the eye with first light, measures the photorefraction of the eye at the second wavelength based on at least one picture of the eye recorded when illuminating the eye with second light, determines the prescription for the eye based on the measured photorefraction at the first wavelength and the measured photorefraction at the second wavelength.

Disclosed is an eye examination apparatus that can be used in professional settings. The eye examination apparatus has a body having a first eye opening and a second eye opening for a user to see into the eye examination apparatus using two eyes. The eye examination apparatus also has a first camera coupled to the body and positioned to acquire ophthalmic images through the first eye opening, and a second camera coupled to the body and positioned to acquire ophthalmic images through the second eye opening. The eye examination apparatus also has at least one display coupled to the body and positioned to be viewable through the first eye opening and the second eye opening.

The present invention is a neutral cylinder refractor, which is a refractor that uses spherical power in combination with cylinder lenses to render them spherically neutral. Every cylinder lens in the refractor, excluding the Jackson Cross Cylinder, has corresponding spherical power added to it to neutralize the spherical equivalent of the cylindrical lenses. The invention can be used to measure the refractive error of a patient's eye, and specifically the cylinder aspect can be measured more easily due to a lack of interference from spherical equivalent.

Systems and methods are provided for improving overall vision in patients suffering from a loss of vision in a portion of the retina (e.g., loss of central vision) by providing a piggyback lens which in combination with the cornea and an existing lens in the patient's eye redirects and/or focuses light incident on the eye at oblique angles onto a peripheral retinal location. The piggyback lens can include a redirection element (e.g., a prism, a diffractive element, or an optical component with a decentered GRIN profile) configured to direct incident light along a deflected optical axis and to focus an image at a location on the peripheral retina. Optical properties of the piggyback lens can be configured to improve or reduce peripheral errors at the location on the peripheral retina. One or more surfaces of the piggyback lens can be a toric surface, a higher order aspheric surface, an aspheric Zernike surface or a Biconic Zernike surface to reduce optical errors in an image produced at a peripheral retinal location by light incident at oblique angles.

A vision stimulation platform is designed for stimulation of brain pathways and retinal cells for vision training and enhancement. Modules of eye exercises are provided to a user, where each module includes an ordered sequence of eye exercises to be performed by the user. The eye exercises comprise one or more screens showing an animated display for the user to view for a time period less than a threshold time (e.g., 10 seconds). The animated display has a color, movement, or pattern designed to stimulate a specific visual pathway of the brain or the retina of the user, and the set of displays is designed to achieve a purpose (e.g., eye relaxation, vision precision, stroke treatment, etc.). At least one of the eye exercises comprises an interactive portion for the user to interact with one or more items on the screen to test the motor cortex of the user.

The disclosure provides a system that may acquire, via an image sensor, an image of an eye of a person; may determine a location of an iris of the eye from the image; may determine a position of a suction ring from the image; may display, via a display, the image; may display, via the display, a first graphic overlay on the image that indicates the location of the iris of the eye; may display, via the display, a second graphic overlay on the image that indicates the position of the suction ring; may determine multiple iris structures from the image; may determine an orientation of the eye based at least on the multiple iris structures from the image; and may display, via the display, information that indicates the orientation of the eye.

Provided are an apparatus and method for measuring a visual acuity (VA) by using a focus-tunable lens. The apparatus includes a display engine, an image combiner, a focus-tunable lens provided on a path of the light guided by the image combiner, an input device, and a processor configured to control the focus-tunable lens to assign different first and second optical powers to first and second lens regions, respectively, on a lens surface of the focus-tunable lens, control the display engine to display a VA measuring image through first and second output regions of the image combiner, control the input device to receive a user's input with respect to the VA measuring image, specify one optical power of the first and second optical powers based on the user's input, and determine a VA of a user based on the specified optical power.

A system, method, and non-transitory computer readable medium for providing a visual examination are provided. A diagnostic module configured to execute on a first computing device communicatively coupled to a head mounted holographic display device worn by a user renders a virtual arrangement displayed within the head mounted holographic display device at an initial simulated distance away from the user. Within the virtual arrangement is an imbedded pattern. A second computing device receives, from leads attached to the user, brain waves of the user. The second computing device displays a visual evoked potential within the brain waves. The visual evoked potential comprises an indication that the user visually identified the imbedded pattern at a second simulated distance away from the user. The visual evoked potential occurs at a focal length of a refractive error of an eye of the user.