2. FUNDU S REA

3. DING HOOD

4. CLIENT: CLIENT: Dennis Hafford Research Specialist Fundus Reading Center

5. ADVISOR: ADVISOR: John G. Webster, Ph. D. Department of Biomedical Engineering

6. TEAM MEMBERS: TEAM MEMBERS: Leah Brandon, Adam Dahlen, Nate Kleinhans, Sara Worzella

7. ABSTRACT In the grading of retina scans at the Fundus Photograph Reading Center, normal office light interferes with the graders ability to efficiently identify lesions and other problematic sites on the retina that are indicative of certain diseases. Since these lesions are often very small, a controlled environment is necessary for grading in order to assure correct identification of these sites. The design of a monitor hood that blocks ambient light is the key element in obtaining accurate grading of retina scans.

8. MOTIVATION Design a reading hood for ophthalmic photograph readers at Fundus Reading Center Block ambient light Provide a controlled environment to grade photographs

9. OPHTHALMIC RESEARCH Problematic sites in retinal scans used to diagnose disease states in eyes Parts of the eye photographed: –Retina –Retinal Vasculature –Optic Nerve Head

10. VIEWING IMAGES Stereoscopes used to grade photographs Graders adhere to strict protocol for quality of photographs Ambient light interferes with grading Current hoods not adjustable or compatible with stereoscope

11. Retinal scans like these are viewed in stereo and used to determine illnesses. http://www.terrymen.demon.co.uk http://www.state.sc.us/forest/stereoscope.jpg This is an example of a stereoscope used to view ophthalmic images.

12. DESIGN CRITERIA Full view of monitor at all times Adjustable length of 60.96cm Removable from monitor or < 38.1cm fixed length Small rear footprint Tapered viewing window 20.32 x 8.89cm Adjustable angle of view Interior light intensity < 64 lux

13. DESIGN MATRIX CriteriaRotating Bar Design Solid Interlocking Panels Design Accordio n Design Ability to Block Light 333 Flexibility445 Projected Cost423 Ease of Storage443 Ease of multiple Use for Client 243 Ease of Manufacturing 3.52 Total20.51920.5 *Scale: 1-5 1: Poor 3: Satisfactory 5: Outstanding

14. FINAL DESIGN Extendable Rods Corner Brackets Adjustable Straps Suraline Hood Support Blocks

15. Cost ItemPrototype Cost (2) 1/4” X 2” X 36 “ Steel Plate18.96 3’ black Velcro1.99 Black Thread1.99 Suraline Fabric10.98 Black Corse Elastic1.98 (5) RC Antenna29.95 Plastic Steel Epoxy3.99 (4) 3/4” Steel Cubes1.00 Screws and Washers2.38 (4) D-Rings2.20 Nylon Straps2.82 Fray Sealer3.69 Total81.93 ItemProduction Costs (2) 1/8” X 2” X 36“ Steel Plate18.96 3’ Black Velcro1.99 Black Thread1.99 Suraline Fabric13.23 Ripstop Nylon8.58 Deco Fabric15.95 Black Corse Elastic1.98 (5) RC Antenna29.95 Plastic Steel Epoxy3.99 1/4” X 2” X 36” Steel Plate4.77 1/4” X 2” X 36” Steel Angle Gauge14.77 (4) 3/4” Steel Cubes1.00 Screws and Washers2.38 (4) D-Rings2.20 Nylon Straps2.82 Fray Sealer3.69 Total Tax7.04 Total135.29

16. FUTURE WORK Additional support at the front of the main hood Space efficient design Angle extension pieces Light weight fabric Stabilize corner pieces Reduce rear light penetration

17. ACKNOWLEDGEMENTS The authors would like to thank Professor John Webster, Dennis Hafford, Troy Grams, and the machine shop staff for their helpful assistance.

18. REFERENCES ARIC Grading Protocol – Lightbox. Fundus Photograph Reading Center 1998. 21 Sept. 2005. http://eyephoto.ophth.wisc.edu/ResearchAreas/Hypertension/LBox /LTBXPROT_995.html Baldridge, Aimee. Get the Picture: Digital Imaging Notes From The Field. 15 Nov. 2004. CNET. 21 Sept. 2005. http://reviews.cnet.com/4520-6501_7-5570902-1.html Ergonomic Standards. International Ergonomics Association. 22 Sept. 2005. http://www.iea.cc/standards// Fundus Photograph Reading Center. University of Wisconsin-Madison 2001. 21 Sept. 2005. http://eyephoto.ophth.wisc.edu/ Hafford, Dennis. Client Meeting. 15 Sept. 2005. Hafford, Dennis. Email to Authors. 20 Sept. 2005. United States Patent and Trademark Office. USPTO Site. 19 Sept. 2005. http://www.uspto.gov/ What They Are and How They Work. Stereo Images from Juneau. 29 Sept. 2005. http://stereo.thurstons.org/stereo_help.htm

19. CORNER BRACKET: SIDE VIEW

21. FRONT HOOD ATTACHMENT

22. VELCRO STRAP ASSEMBLY

23. CORNER BRACKET: SIDE VIEW

24. EXTENDABLE ROD