Patents by Inventor Albert Weijland

Albert Weijland has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5319398
    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.
    Type: Grant
    Filed: January 16, 1992
    Date of Patent: June 7, 1994
    Assignee: Interzeag AG
    Inventor: Albert Weijland