Kenneth N Tr Richardson

US Patent:

42550220, Mar 10, 1981

Filed:

Oct 2, 1978

Appl. No.:

5/948115

Inventors:

Christian L. Kuether - Houston TX
Robert E. Williams - Pearland TX
Thomas A. Decker - Houston TX
Charles Kurtzman - Houston TX
Kenneth T. Richardson - Anchorage AK
Richard A. Harrison - Houston TX

Assignee:

Baylor College of Medicine - Houston TX

International Classification:

A61B 306

US Classification:

351 24

Abstract:

A microprocessor based instrument designed to retrofit into existing perimeters utilizing the mechanics and stimulus control aspects of the existing perimeter. The device includes an array board positioned adjacent the perimeter mechanical arm and includes a multiplicity of visual indicators spatially arranged in a composite pattern of testing locations required for one or more ophthalmic testing procedures. A processor is connected to the array board for sequentially actuating the visual indicators in accordance with the testing procedure whereby the operator guides a cursor attached to the perimeter mechanical arm to align with the actuated indicators and control the location of the perimeter test stimulus. The processor includes means for sensing the position of the cursor, silently presenting a light flash to the patient, and a memory which records the patient's responses. When the program test sequence has been completed, the missed locations on the array board actuate allowing the examiner to manually record the data on a printed form.