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.

A system and method for home testing of patient focal length, and detecting for the presence or changes in myopic conditions utilizing a multi-colored testing screen. Utilizing the varied refractive properties of each wavelength of light (colors), changes in myopia and focal length can be monitored in each of the separate colors. Baseline visual acuity is determined, and the testing occurs with relevant-sized optotypes. Optotypes are displayed in red, white, and green, simultaneously on a display screen set at four meters distance. Games and acuity tests are conducted to determine the focal acuity at each of the wavelengths. Results are recorded and used for future diagnosis and treatment.

A subjective optometry apparatus includes: a subjective measurer which has a corrective optical system disposed on an optical path of a light projecting optical system configured to project a target light flux toward an examinee's eye and configured to change an optical characteristic of the target light flux and which is configured to subjectively measure an optical characteristic of the examinee's eye; an acquisitor configured to acquire position information on at least one of examinee's right and left eyes; a determiner configured to determine, based on the position information acquired by the acquisitor, whether or not subjective measurement can be implemented in a binocular open state of the examinee's right and left eyes, thereby acquiring determination information; and a determination information output unit configured to output the determination information acquired by the determiner.

A system and method for an eye test application for mobile devices and in particular to applications for self-determination of eyeglass prescription via mobile computing devices comprising Simultaneous Split Point Focus (SSPF) and Low Latency Dynamic Distance Monitoring (LLDDM) for enabling self-determination of eyeglass prescription for a user via a mobile computing device, the device comprising: volatile and non-volatile memory for storing data; a processor configured for executing program instructions stored in the non-volatile memory; a visual display screen adapted to receive image information from the processor to present instructions and images to a user; and a camera configured to receive images of the user's pupils during a test situation; wherein the system comprises application program instructions for directing the processor to undertake a method for determining an eyeglass prescription, the method comprising: determining if an eye of the user is myopic, and if the user's eye is myopic; determining Principal and Axis Meridians of a user's eyes while the user is observing the image information on the display screen; enabling the system of LLDDM for real time determination of the refractive power errors in the Principal and Axis Meridians of a user's eyes in while the user is observing the SSPF image information on the display screen; calculating Sphere, Cylinder and Axis prescriptions from the Principal and Axis Meridian values obtained via the LLDDM system; and displaying the calculated prescription values to the user.

A device that simulates motion used for training and testing accommodation, vergence, and dynamic visual acuity is provided. The device includes an apparatus having plurality of light sources that can be adjusted in color and luminance disposed on a flexible substrate that can be adjusted to adjust the path and signal to simulate motion of an object. The device can include a controller that includes a processor to provide pre-determined, customizable, or random timing, location, and sequence of the motion presentation. The user response to the simulated motion can be collected, processed, and transmitted by the controller.

Embodiments of the present disclosure relate to a field of vision testing technique, and particularly to a vision testing apparatus and method. The vision testing method and apparatus can concurrently test vision and ability for distinguishing colors concurrently by using vision synthetic-testing pictures, wherein a character in the vision synthetic-testing picture is used to test the vision, and color combination in the vision synthetic-testing picture is used to test the ability for distinguishing colors.

The method include: (a) displaying at least one dynamic target image of at least one sign over a display area; (b) receiving subjective feedback from the subject indicating that the subject is positioned at a maximum distance of best acuity (MDBA) from the target image, wherein the MDBA is the maximum distance in which the subject recognizes the sign; (c) measuring one or more parameter associated with distance, during the time the subject has reached the MDBA distance, using at least one sensor; (d) estimating the MDBA by estimating the distance between the eye of the subject and the display area in which the target image is displayed by using the sensor data and (e) calculating the refractive error of the eye according to the estimated MDBA and characteristics of the target image.

The method include: (a) displaying at least one dynamic target image of at least one sign over a display area; (b) receiving subjective feedback from the subject indicating that the subject is positioned at a maximum distance of best acuity (MDBA) from the target image, wherein the MDBA is the maximum distance in which the subject recognizes the sign; (c) measuring one or more parameter associated with distance, during the time the subject has reached the MDBA distance, using at least one sensor; (d) estimating the MDBA by estimating the distance between the eye of the subject and the display area in which the target image is displayed by using the sensor data and (e) calculating the refractive error of the eye according to the estimated MDBA and characteristics of the target image.

An apparatus for performing optometric measurements includes an opto-adjustable lens, the optical power of which is adjustable, with the lens being controlled by a periodic signal configured for producing a periodic optical power wave over time. The apparatus also includes a component for the adjustment of the mean value of the periodic optical power wave. The apparatus further includes an optical projector system for projecting a plane of the opto-adjustable lens onto a plane external to the apparatus, and in that the periodic signal has an amplitude such that it produces an amplitude of the periodic optical power wave corresponding to a chromatic difference of focus between a first wavelength and a second wavelength of visible light which passes the opto-adjustable lens. A system for the performance of optometric measurements and a method for adjusting the optical power of an adjustable lens are related to the apparatus.

An apparatus for performing optometric measurements includes an opto-adjustable lens, the optical power of which is adjustable, with the lens being controlled by a periodic signal configured for producing a periodic optical power wave over time. The apparatus also includes a component for the adjustment of the mean value of the periodic optical power wave. The apparatus further includes an optical projector system for projecting a plane of the opto-adjustable lens onto a plane external to the apparatus, and in that the periodic signal has an amplitude such that it produces an amplitude of the periodic optical power wave corresponding to a chromatic difference of focus between a first wavelength and a second wavelength of visible light which passes the opto-adjustable lens. A system for the performance of optometric measurements and a method for adjusting the optical power of an adjustable lens are related to the apparatus.