134 results about "Vision test" patented technology

An adjustable and foldable device for visual field testing or treatment includes a computer display mounted on a base and presents visual stimuli to the patient. An associated head support assembly with a chinrest supports and positions the head of the subject with respect to the display. An articulated arm joins the base and the head support assembly. The arm will resist a given downward force supplied by the head, and is foldable toward the display to create a more compact and portable device. Additional articulations may allow the head support assembly to fold upon arm, and the arm to fold upon the base. The device may include a locking mechanism that secures the device in a folded or unfolded configuration.

An apparatus for determining the objective refraction of a patient's eye includes a transparent window and a wavefront measurement device that determines aberrations in a return beam from the patient's eye after the beam passes through a corrective test lens in the apparatus. The wavefront measurement device outputs an instant display representative of the quality of vision afforded the patient through the test lens. The display can be a representation of a Snellen chart, convoluted with the optical characteristics of the patient's vision, an overall quality of vision scale or the optical contrast function, all based on the wavefront measurements of the patient's eye. The examiner may use the display information to conduct a refraction examination and other vision tests without the subjective response from the patient.

In one aspect, there is provided a handheld vision tester comprising a display, cursor control, interface port, and camera. The display delivers a series of images making up vision tests to a user who interacts with the vision tests by using the display and cursor control of the handheld vision tester. The camera verifies the user is taking the vision tests. The results of the vision tests are stored in the handheld communication device. The interface port allows for communication of the stored results of the vision tests with external devices. In another aspect, there is provided a calibration system for the handheld vision tester. The calibration system includes a stand to hold the handheld vision tester and a reflective surface substantially parallel to a display of the handheld vision tester.

An apparatus for determining the objective refraction of a patient's eye includes a transparent window and a wavefront measurement device that determines aberrations in a return beam from the patient's eye after the beam passes through a corrective test lens in the apparatus. The wavefront measurement device outputs an instant display representative of the quality of vision afforded the patient through the test lens. The display can be a representation of a Snellen chart, convoluted with the optical characteristics of the patient's vision, an overall quality of vision scale or the optical contrast function, all based on the wavefront measurements of the patient's eye. The examiner may use the display information to conduct a refraction examination and other vision tests without the subjective response from the patient.

The present invention provides a reading test to measure vision loss. In one embodiment, the vision loss is due to disease progression. The tests are useful in evaluating the effects of intervention in vision deterioration. The tests are non-invasive, simple, quick, sensitive, reproducible, and easy to administer. The tests measure the subject's reading speed and accuracy under defined conditions of illumination and contrast. The results of these tests may be used to determine if treatment of a disease should be initiated, terminated, altered, or remain unchanged.

A system and method for ordering and purchasing eyeglasses remotely via a network. The network eyeglass ordering and marketing system includes a user interface unit (1), an eyeglass ordering and marketing service center (2), and a network that connects therebetween. The system includes an eyeglass frame selection means (27) for selecting eyeglass frames from among a plurality of eyeglass frames in response to user input, a means (22) for creating display information concerning eyeglass frames, a means for testing the vision of the user, and an eyeglass lens selection means (26) for selecting lenses from among a plurality of eyeglass lenses in response to user input. The system also includes an eyeglass ordering and marketing processor (23) wherein the frame selection means (27), the vision test means, and the lens selection means (26) carry out a vision test in response to the requirements of the user. Appropriate eyeglass frames and eyeglass lenses are determined which best fit the user. The user is provided with information concerning ordering and marketing and an eyeglass purchase contract is concluded with the user. The system also includes a display information creating means (22) for creating information concerning eyeglass frames in cooperation with or independently of the frame selection means (27) and / or the eyeglass ordering and marketing processor (23) to transmit the eyeglass frame information to the user interface unit (1).

The invention belongs to the technical field of medical devices. The invention provides a vision test terminal to solve the problem that the current vision test methods is not convenient, and test process is more relatively complicated. The vision test terminal includes a display unit, a storage unit, a processing unit, a receiving unit, and a user input unit. The processing unit is connected to the display unit, the storage unit, and the receiving unit, and the user input unit is connected to the receiving unit. The storage unit is used for storing vision test problems; the processing unit is used for reading the vision test problems; the display unit is used for displaying the vision test problems; the user input unit is used for sending answers of testers to the receiving unit; the receiving unit is used for sending the answers of the testers to the processing unit; and the processing unit processes the answers of the testers. According to the invention, the process of the vision test is simplified, so that the testers can conveniently carry out the vision test.

The invention relates to a measurement device, in particular to an eye vision measurement device. The eye vision measurement device is accurate in measurement, practical, effective, and convenient to use. The eye vision measurement device comprises a base plate and the like. A measurement device body is arranged on the left portion of the base plate, and a pulling device is arranged at the bottom of the base plate. The eye vision measurement device has the effects of being accurate in measurement, practical, effective and convenient to use; manual control is adopted by the eye vision measurement device, and a user can sit on a chair comfortably for vision measurement; and through an illuminating lamp, the user can see a vision test chart more clearly, and thus measurement is more accurate and effective.

A vision test pattern indicator is provided with a color display for displaying optotypes used for binocular vision tests which are conducted with a red filter set in front of an eye of an examinee and a green filter set in front of the other eye, and an arithmetic control part which controls the color display as a first optotype figure is displayed in a green color, a second optotype figure is displayed in a red color, a third optotype figure for fusion stimulus is displayed in a color excluding red and green components and a background of the optotypes is displayed in a white color.

A system for eyesight diagnosis may include a vision test unit and a controller. The vision test unit may include at least one eye movement tracking unit configured to track the movement of a portion of the eye, at least one screen for visual stimulation and a shuttering unit configured to controllably block the field of view (FOV) of each eye separately. The controller may be configured to: display to a patient a first visual stimulation on the at least one screen, cause the shuttering unit to block the FOV of a first eye of the patient while unblocking the FOV of a second eye, receive a first signal indicative of the second eye movement of the patient from the at least one eye movement tracking unit and diagnose the patient's eyesight based on the received first signal.