Perimeter
AssigneeKowa Company, Ltd.
InventorsYoshikatsu Suzumura, Takuya Hara
Life of this patent
Estimating the term…
Abstract
A perimeter has an optical projection system that projects a target spot on the inside surface of a visual field dome. The position at which the target spot is projected is controlled electronically. Input devices are used to input control information to control the target spot projection position and to record patient response information. A display means provides feedback display of the control information and patient response information, and also functions as an input screen via which the control and response information is input.
Claims14
A perimeter that sequentially projects a target spot onto a plurality of user-selected positions located on an the inside surface of a visual field dome and records the positions of the projected target spot and a patient's responses relating to the visual recognition thereof, comprising:
- an optical projection system for projecting the target spot onto the inside surface of the visual field dome;
- control means for electronically controlling the optical projection system to sequentially project the target spot onto the plurality of user-selected positions;
- input means for controlling the control means to enable sequential manual entry of the user-selected projection positions of the target spot and for recording of response information relating to the patient's responses;
- and
- display means for displaying the user-selected positions and response information supplied by the input means and having an input surface responsive to the input means for entry of the user-selected positions and response information;
- wherein the control means includes semi-automatic control means for controlling the optical projection system during an examination to project the target snot onto only the user-selected positions on the inside surface of the visual field dome such that the target spot is projected to positions corresponding to the positions input on the display means using the input means.
An oculo-perimetric device for performing a visual field examination, comprising:
- a visually observable target;
- a light projector for projecting light onto a surface of the target;
- an input device for manual input of user-selected projection positions;
- and semi-automatic control means for controlling the light projector to cause the light to be projected onto only the user-selected projection positions on the target surface during an examination.
Dependencies are inferred from the claim text.