Photochromic dilating pupil for ocular prosthetics

Details Photochromic dilating pupil for ocular prosthetics Photochromic dilating pupil for ocular prosthetics

1990-11-15

1991-10-29

Shay, Randy Citrin

Prosthesis (i.e., artificial body members), parts thereof, or ai

Eye prosthesis

623 5, A61F 214

Patent

active

050612794

ABSTRACT:
The intent of this invention is to allow for a simulation of natural human pupil dilation in an ocular prosthetic. This will be achieved through the use of photochromic pigments that will change the density of their color in response to differing wavelengths of light from clear to opaque. These pigments would separate two or more pupil disks of differing diameter, and by increasing their density of color in response to different wavelengths of light would opaque successively smaller pupil disks, and give the impression of the contraction of the natural eye's pupil. Upon removal from the source of that wavelength of light the pigment would return to its transparent resting state and reveal the underlying pupil disk simulating a dilated natural pupil.

REFERENCES:
patent: 4272910 (1981-06-01), Danz
patent: 4332039 (1982-06-01), LaFuente

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