Methods and apparatus for measuring visual acuity in preverbal children
Patent 6402320 Issued on June 11, 2002. Estimated Expiration Date: 
July 10, 2020. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
July 10, 2020. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesMethod for presenting high level interpretations of eye tracking data correlated to saved display images System and method for controlling host system interface with point-of-interest data Patent #: 6243076 InventorApplicationNo. 612903 filed on 07/10/2000US Classes:351/224, Perimeter type351/209Including eye movement detectionExaminersPrimary: Manuel, GeorgeAttorney, Agent or FirmInternational ClassesA61B 003/02A61B 003/14 AbstractAn automated method of measuring visual acuity utilizing an electronic visual display comprises the steps of: (a) presenting a fixation target for attracting a subject's attention on said electronic visual display; then (b) presenting a test screen on said electronic visual display, wherein said test screen comprises at least two separate fields, with one of said fields containing a first test pattern and another of said fields containing a control pattern; wherein said test pattern is configured to stimulate eye movement by said subject when said pattern is recognizable by said subject; then (c) detecting whether or not eye movement to said test pattern occurs, the presence of eye movement to said test pattern confirming the discernability of said first test pattern by said subject; and then (d) repeating steps (b) and (c) above with at least one subsequent test pattern, wherein said subsequent test pattern is more difficult to discern than said first test pattern; and then (e) determining said subject's visual acuity from the presence or absence of detected eye movement to said first test pattern and said at least one subsequent test pattern. Methods of measuring peripheral vision and apparatus for carrying out the foregoing methods are also disclosed.Other References
Field of SearchIncluding eye movement detectionUsing photodetector Perimeter type With bowl type screen Including target image projection Tachistoscope type Including test chart or target Stereoscopic type Illuminated DISPLAY PERIPHERAL INTERFACE INPUT DEVICE Including orientation sensors (e.g., infrared, ultrasonic, remotely controlled) | |
