1. Weisshaar, C.L., Wentland, A.L.
Eye Dropper Device
DeLorme, J.J., Hanson, E.E.,
Weisshaar, C.L., Wentland, A.L.
Dept. of Biomedical Engineering
University of Wisconsin – Madison
Client: Lynn Buhmann
Advisor: Willis Tompkins

3. Overview of Presentation
Motivation/Background
Current eye dropper devices
Problem statement
Design alternatives
Decision matrix
Future plans
Questions?

4. Motivation/Background
Common eye diseases:
Glaucoma
Macular degeneration
Cataracts
Patients need several different eye drop medications daily

5. Motivation/Background
Difficulty delivering eye drops due to
Tremors
General loss of dexterity
Because of these etiologies
Medication is wasted
Wasted medication increases patient cost

6. Current products Owen Mumford Autodrop/Autosqueeze Devices
Assists the patient with administering the drop
Fails to control the amount administered

7. Problem Statement To develop an eye drop device that can
Administer one drop of medication
Assist the user in placing the eye drop into the eye
Accommodate different types of medications (different bottle sizes)
Conserve medication to reduce cost

8. Design 1 Advantages Disadvantages Simple design Low cost
Prevents streaming
Disadvantages
Numerous unknown parameters
Sensitive system
Contamination possibilities exist

9. Design 2

10. Design 2 Advantages Disadvantages Simple design Low cost
Easy to operate
Disadvantages
Medication could become contaminated
Surface adhesion may pose a problem

11. Design 3

12. Design 3 Advantages Disadvantages Simple design Low cost
Can administer a single drop
Highly controllable
Disadvantages
Multiple drops still possible if incorrectly set up
Difficulty cleaning device
Must be calibrated (or set up) for different bottles

13. Design Matrix #1 #2 #3 Simplicity 1 2 Ease of use Cost 3 Safety
Sterility
Accuracy
Total 11 9
1 = good = medium 3 = poor

14. Future plans Finalize eye dropper design Construct a prototype
Test the device on different bottle sizes
Test accuracy (1 drop) and consistency
Evaluate the difficulty in calibrating to different bottle sizes

15. Questions??