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    • 4. 发明授权
    • Patient responsive eye fixation target method and system
    • 患者反应眼固定目标的方法和系统
    • US5442412A
    • 1995-08-15
    • US232959
    • 1994-04-25
    • Rudolph W. FreyGeorge R. Downes, Jr.
    • Rudolph W. FreyGeorge R. Downes, Jr.
    • A61B3/113A61B5/00A61B3/02
    • A61B5/486A61B3/113
    • A biofeedback method and system provide eye position feedback to a patient. A first light source produces a ring of visible light centered about an optical axis at a perceived first position. A second light source produces a dot of visible light centered on the same optical axis as that of the ring at a perceived second position. As perceived by the eye, the ring's first position is closer to the eye than the dot's second position. The eye will further perceive the dot as being centered in the ring when the eye moves its visual axis into spatial and angular alignment with the optical axis shared by the dot and ring. An eye movement sensor detects a quantifiable amount of eye movement to generate an error signal. The error signal is supplied to the second light source to adjust the dot's appearance whenever the patient needs to realign the eye's visual axis with the optical axis of the dot and the ring. The invention may also include a third light source to produce a directing light at a visually resolvable angle from the dot in a direction that is approximately opposite to the direction of eye movement.
    • 生物反馈方法和系统向患者提供眼睛位置反馈。 第一光源在感知的第一位置处产生围绕光轴居中的可见光环。 在感知的第二位置处,第二光源产生以与环的相同的光轴为中心的可见光点。 正如眼睛所察觉到的,戒指的第一个位置比点的第二个位置更接近眼睛。 当眼睛将其视轴移动到由点和圈共享的光轴的空间和角度对准时,眼睛将进一步感觉到该点以环为中心。 眼睛运动传感器检测可量化的眼睛运动量以产生误差信号。 每当患者需要用点和环的光轴重新对准眼睛的视轴时,将误差信号提供给第二光源以调整点的外观。 本发明还可以包括第三光源,以在与眼睛运动方向大致相反的方向上以点的视觉上可分辨的角度产生引导光。