Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Eye prosthesis – Globe
Patent
1999-03-04
2000-10-31
Snow, Bruce
Prosthesis (i.e., artificial body members), parts thereof, or ai
Eye prosthesis
Globe
446389, A61F 214
Patent
active
061395773
ABSTRACT:
An ocular prosthetic device is provided which includes a simulated pupil that does not interfere with the intended appearance of the iris image, and further which adapts to a range of ambient lighting environments to simulate the appearance of a natural eye. An iris image is provided to reproduce the color and pattern of a natural eye. A visual display, or light source, is located behind the iris image. The visual display has a series of concentric rings to produce a size range similar to the size range between that of a dilated and contracted pupil. The iris image has a pattern of light transmissive openings to permit light from the rearwardly disposed visual display to pass through the openings. The concentric rings, when activated, are visible through the openings in the iris image, and present the appearance of a pupil of a size dependent on the number of activated rings. When the rings are not activated, that is, when they are not darkened, the iris image, which overlies the deactivated rings, is visible such that the pupil appears more contracted. A light sensor located at the center of the visual display receives light through clear areas in the center of both the iris image and the visual display. By selectively activating and darkening increasingly sized rings in the series of concentric rings, the appearance of a pupil is provided.
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Duncanson Paul A.
Schleipman Fredrick
Schleipman Russell
Van Sleet David P.
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