1. Group 21 Eye Muscle Prosthesis
Team Members:
Brett Boskoff Matt Patton Jeff Tse
Advisors:
Leonard Pinchuk, Ph.D., D.Sc.
Stewart Davis, M.D.
Innovia LLC

2. Problem Statement Extraocular Muscle Strabismus Double Vision
Amputation
Dysfunction
Paralysis
Strabismus
Incidence of 64.1/100,000 patients younger than 19 years old, corresponding to a prevalence of 1.0% of all children younger than 11 years of age
Double Vision
Specific problem we are designing for

3. Previous Solutions Eye patch or special (prism) spectacles
Permanently suture eye into primary position
Stretchable band made of elastic material
Previous solutions, their features, and their disadvantages

4. Design Approach Nose EYE Dacron muscle-suture platform
Titanium T-plate
Insertion of medial rectus
Tube (vertical bar of T-plate)
EYE
Design approach, features, and improvements on previous implants
Spring coil/ elastomer
Non-absorbable suture
Titanium ball

5. Prosthesis
Prosthesis

6. Component Materials / Properties
Titanium T-plate
Nitinol spring
Elastomer (QuatromerTM)
Dacron platform
Materials of prosthesis components and their properties with respect to biocompatibility, spring memory, and history as biomaterial

7. Project Goals Create a prototype of the prosthesis
Develop a proof-of-concept model
Develop fatigue test for spring

8. Completed Work Physiological constraints identified
Determined and modified final design of prosthesis
Attaching T-plate, spring / elastic tubing mechanism, and insertion of muscle
Modified design so that spring prosthesis (not T-plate) could be replaced, if necessary
Determined component materials for muscle-suture platform and spring

9. Future Work Determine component dimensions for:
T-plate (vertical length)
Muscle-suture platform (width and length)
Spring (inner diameter, wire diameter, length)
Begin manufacturing springs and load testing