Ocular Prosthesis Display for Natural Eye Movement
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Solution Overview
Problem
Conventional ocular prostheses fail to achieve natural-looking movement due to the lack of space in the closed loop of tissue formed by the conjunctiva, known as the prosthesis space, which restricts the prosthesis's ability to move sufficiently.
Innovation Solution
The development of an ocular prosthesis with a display device, such as an electronic or mechanical display device, that provides realistic-looking movement within the confined prosthesis space. This includes a housing shaped to fit under an eyelid, an implant detector to detect the angular orientation of the orbital implant, and a processor to determine a natural appearance for the visible portion of the eyeball and render an image accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a conventional molded prosthesis is placed in the prosthesis space, then the prosthesis can be positioned in the eye socket, but the prosthesis cannot achieve sufficient movement due to the confined space
Solution Approach 1:
The patent creates a two-dimensional display surface that copies and simulates the appearance of a three-dimensional moving eye. Instead of physically moving the entire prosthesis, the display device renders images that mimic eye movement, pupil response, and iris motion, providing the visual effect of natural eye behavior within the confined prosthesis space.
2Stability of the object's composition
If the prosthesis space is confined by the conjunctiva loop, then the prosthesis is stable in position, but the prosthesis cannot demonstrate normal motility
Solution Approach 1:
The patent replaces the mechanical movement system with an electronic display system. Instead of relying on physical movement of the prosthesis within the conjunctiva loop, the invention uses a display device controlled by sensors and processors to simulate eye movement visually, eliminating the need for mechanical motility while maintaining the stability provided by the conjunctival constraint.
3Shape
If conventional prostheses are used, then the appearance can be maintained in photographs, but the prostheses do not appear realistic when the patient attempts to move their eyes
Solution Approach 1:
The patent transforms the static prosthesis appearance into a dynamic visual display. The display device continuously updates the rendered image based on detected head position, gaze direction, and facial expressions, creating a dynamic representation of eye movement that responds naturally to the patient's actions, unlike static conventional prostheses that only appear realistic in photographs.
4Device complexity
If conventional prostheses without pupils are used, then the structure is simple, but the prostheses do not respond to light and serve as a daily reminder of deformity
Solution Approach 1:
The patent uses color and brightness changes on the display device to simulate pupil response to light. The rendered iris and pupil on the display can change size, color intensity, and brightness in response to detected light conditions, providing a natural-looking photoreactive response that reduces the psychological impact of having a prosthesis, while building upon rather than completely replacing the basic prosthesis structure.
Data Source
AI summary
An ocular prosthesis includes a display device visible at an anterior portion of the ocular prosthesis. The display device is configured to present a changeable image that represents a natural appearance and movement for a visible portion of an eyeball of a subject. A system includes, besides the ocular prosthesis, an implant marker configured to move with an orbital implant disposed in an eye socket of a subject. A method includes determining a change in orientation of an orbital implant in a subject and determining an update to a natural appearance for a visible portion of an eyeball for the subject based on the change in orientation of the orbital implant. The method also includes rendering an update to an image of the natural appearance for a display device disposed in an ocular prosthesis configured to be inserted in the subject anterior to the orbital implant.