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    • 9. 发明授权
    • Perimeter
    • US11737664B2
    • 2023-08-29
    • US16961547
    • 2018-08-01
    • Chen Lin
    • Chen Lin
    • A61B3/00A61B3/024A61B3/113
    • A61B3/0091A61B3/0083A61B3/024A61B3/113
    • A perimeter, including two types: one is a fixation forcing perimeter, and the other is an objective perimeter combined with electro-physiology under forced fixation; the perimeter comprises a fixation forcing device, a display conduction device, a perimetry display device, a feedback device for recording feedback information, and a control center for controlling the perimetry display device and collecting feedback information; the fixation forcing device comprises a negative pressure ring (2) and a negative pressure tube (3), and is adsorbed to the eyeball by negative pressure; when the eyeball moves, the fixation forcing device moves synchronously, and the fixation is forced at the same position, thereby eliminating the influence of a fixation point on the examination results of the perimeter; in the objective perimeter, an electro-physiological signal after forced fixation is automatically recorded by an electro-physiological instrument, so that the subjective response of a patient is eliminated, and the examination results are objective; and the change in the field of view can be early discovered using the electro-physiological signal as an analysis indicator.