1. Blinking Orbital Prosthesis
BME 200/300
Client: Greg Gion
Advisor: Mitch Tyler
Andrew Bremer, Padraic Casserly,
Rebecca Clayman, Katie Pollock

2. Outline Orbital prosthetic history 3 Prosthesis designs Design Matrix
Design Choice
Future Plans
Questions

3. Problem Statement Orbital exenteration Replaced by an acrylic eye
Prosthetic eye does not blink
Need mechanism causing eye to blink
Synchronization with working eye

4. Background Last semesters project/problems Client Requirements
Single blink
Less noise
Size
Safety
Realistic speed

6. Design 1—Solenoid Actuator
Features
Solenoid
Rear of the eye
Spring?
Simple mechanism, only need to
turn on and off
Drawbacks
Power
Creation/Purchase of Solenoid

7. Design 2—Linear Actuator
Features
Linear Actuator located behind lid
Circuitry included
Drawbacks
Expensive
Size

8. Design 3—Belt/Motor Features Drawbacks Motor Actuator
Significant circuitry to change direction of motor
Bulky and complicated

9. Design Matrix Design Noise (10) Control of Current (20) Size (20)
Safety
Ease of Manu-facture
Cost
Totals
Solenoid Actuator 9 17 16 15 12 8 77
Linear Actuator 7 19 10 2 72
Belt/Motor 5 56

10. Chosen Design—Solenoid Actuator
Inexpensive
Solenoid
Rear of the eye
Spring?
Simple mechanism, only need to turn on and off

11. Future Work Obtain materials and assemble prototype
Fit eyelid velocity to that specified by PDS
Complete circuitry
Synchronization—time permitting

12. QUESTIONS?!?

13. References
Image slide 4 Investigative Ophthalmology & Visual Science, Vol. 32, No. 13, December 1991 Copyright © Association for Research in Vision and Ophthalmology