Method for determining a refraction of at least an eye of a person under specific spectral conditions, the method including: an eye illumination step, during which the eye of the person is illuminated under the specific spectral conditions, the specific spectral conditions being provided by a polychromatic source having a spectrum which is different from the spectrum of a white light source and/or by a chromatic filter positioned before the eye of the person and illuminated by a source; and a refraction determination step during which the refraction of the eye of the person is determined under the specific spectral conditions.

A method of evaluating a vision of a subject including: causing a display to define a first display portion and a second display portion; causing the display to emit, from the first display portion, light having a first wavelength value and to emit, from the second display portion, light having a second wavelength value; causing the display to present, on the first display portion, one or more first optotypes and to present, on the second display portion, one or more second optotypes; varying with time the second wavelength value within a predefined wavelengths range; obtaining an indication concerning a subject's perception of the one or more second optotypes as compared to a subject's perception of the one or more first optotypes; and determining a vision disorder of the subject based on the second wavelength value for which the indication has been obtained.

Embodiments of the present disclosure relate to computer storage, methods, and systems for the optimization of accessible color themes. Systems and methods are disclosed that leverage the use of confusion lines to identify and highlight relationships between colors that may be inaccessible (e.g., indistinguishable) for a person with a vision impairment, such as a color vision deficiency. In some embodiments, a graphical user interface is provided that, based on a selection of colors in a color wheel, visually indicates curves of confusion for each color in the selection of colors. Each curve of confusion visually indicates a confusion of colors for a type of vision impairment, such as a CVD.

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.

A dyschromatopsia deciding method and apparatus is provided. The apparatus includes an I/O interface configured to receive an input for a program, a memory configured to store the input for the program and a processing result of the input, and a processor configured to execute the program, wherein the processor is configured to provide first CAPTCHA information for distinguishing between a person and a machine together with second CAPTCHA information for deciding dyschromatopsia, receive first CAPTCHA input information corresponding to the first CAPTCHA information and second CAPTCHA input information corresponding to the second CAPTCHA information together with authentication information, authenticate a user based on the first CAPTCHA input information, decide dyschromatopsia of the user based on the second CAPTCHA input information, and store a decision result of the dyschromatopsia in response to a decision that the user has the dyschromatopsia.

A system for ocular assistance is disclosed. The plurality of subsystem includes an ocular condition registration subsystem, configured to register one or more users. The plurality of subsystem includes an ocular calibration subsystem, configured to determine a plurality of ocular settings. The plurality of subsystem includes a device configuration identification subsystem, configured to determine a plurality of device settings for each of one or more device associated with the registered one or more users. The plurality of subsystem includes a screen customization subsystem, configured to determine values corresponding to the plurality of ocular settings based on a pre-stored look up table and determined plurality of device settings. The screen customization subsystem modifies current values corresponding to the plurality of ocular settings to the determined values. The system modifies or rectifies the screen images or texts for suffering users.

Configurations are disclosed for a health system to be used in various healthcare applications, e.g., for patient diagnostics, monitoring, and/or therapy. The health system may comprise a light generation module to transmit light or an image to a user, one or more sensors to detect a physiological parameter of the user's body, including their eyes, and processing circuitry to analyze an input received in response to the presented images to determine one or more health conditions or defects.

Configurations are disclosed for a health system to be used in various healthcare applications, e.g., for patient diagnostics, monitoring, and/or therapy. The health system may comprise a light generation module to transmit light or an image to a user, one or more sensors to detect a physiological parameter of the user's body, including their eyes, and processing circuitry to analyze an input received in response to the presented images to determine one or more health conditions or defects.

A handheld smart phone includes programming for performing various vision-related tests. The smart phone includes a touch sensitive screen, microphone, speaker, other sensors, processor and persistent storage for execution of software, multiple communications network interfaces and other device interfaces. The display delivers vision tests and, together with the speaker, related audio instructions to a user. The user interacts with the vision tests by using tactile and audio commands to the device screen and microphone. The test results are assembled into a report that can be transmitted to persons of the user's choice, such as a care provider. The capability is included for transmitting results to the remainder of the system for storage, analysis, events, alerts for medical personnel's user treatment and multiple user population analysis.

An apparatus for use in the measurement of the optical density of macular pigment in the human eye, and an apparatus for the use in measuring the lens optical density of a human eye. The apparatus is particularly applicable to flicker photometers, which are used to measure the macular pigment in the human eye.