Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Objective type
Patent
1992-01-16
1994-06-07
Sikes, William L.
Optics: eye examining, vision testing and correcting
Eye examining or testing instrument
Objective type
351211, 351246, A61B 310
Patent
active
053193989
ABSTRACT:
A computerized perimeter is utilized to examine the field of vision of a subject's eye while the eye is located at or at least close to a predetermined position in which the optical axis of the eye is maintained in or at least close to a predetermined orientation. The eye is presented with a sequence of stimuli which issue from a radiation source and are transmitted, as a rule only once, to each of a plurality of computer-selected locations in the area of the optical of the eye at the predetermined position. The value (the intensity and/or the size) of each stimulus is increased until the eye discerns the presented stimulus and the subject reacts as a result of discernment of the presented stimulus. Subjective and/or objective signals are generated by the subject in response to detection of stimuli, i.e., each such signal can be said to denote that value of a stimulus which is sufficiently high to ensure discernment of the stimulus by the eye. Such signals are transmitted to the computer and the computer utilizes the signals to terminate the presentation of a stimulus in response to reception of the corresponding signal.
REFERENCES:
patent: 3883235 (1975-05-01), Lynn et al.
patent: 4012128 (1977-03-01), Regan
patent: 4083365 (1978-04-01), Yancey
patent: 4429961 (1978-02-01), Sheingorn
patent: 5046835 (1991-09-01), Billeter
Dang Hung Xuan
Interzeag AG
Sikes William L.
LandOfFree
Method of and apparatus for testing visual functions of human ey does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of and apparatus for testing visual functions of human ey, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of and apparatus for testing visual functions of human ey will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-796183