Fundus Reading Hood Team Members Leah Brandon (Team Leader) Adam Dahlen (Communicator) Sara Worzella (BSAC) Nathan Kleinhans (BWIG) Client Dennis Hafford Advisor John G. Webster

Overview Problem Statement Motivation Background Product Design Specification Designs Decision Matrix Future Work Questions

Problem Statement The goal of this project is to develop a monitor hood that will block ambient light for the photograph graders at the Fundus Photograph Reading Center. Determining problematic sites in retinal scans is used to diagnose disease states in the eyes. A controlled environment is necessary for grading in order to assure correct identification of these sites. Creating a monitor hood will provide this controlled environment.

Motivation Fundus Reading Center Mission: “strives to further the understanding and treatment of preventable blindness through interpretation of ophthalmic images in clinical studies”

Ophthalmic Research Ophthalmic Photography is noninvasive Parts of the eye photographed: –Retina –Retinal vasculature –Optic nerve head –Optic discs Research Areas: –Diabetic Retinopathy –Age-related Macular Degeneration –Hypertensive Changes of the Retina –Studies of the Ocular Complications of AIDS (CMVR) –Age-related Eye Disease Study (AREDS).

Viewing Fundus Photographs Use stereoscope to view photographs on computer monitor Photographs viewed in stereo Readers grade photographs – Adhere to strict protocol for quality of ophthalmic photographs Ambient light is a major concern when viewing

Client Requirements Full view of monitor at all times Adjustable length of 24 inches Removable from the monitor or < 15 inch fixed length Small footprint Minimal storage space

Client Requirements Cont. Taper to a closed viewing port of approximately 8 inches by 3.5 inches Flexible viewing window Adjustable angle of view Design flexibility 64 lux

Current Monitor Hoods Reduce glare and background light Does not block ambient light Not adjustable Not compatible with stereoscope

Alternative Designs Rotating Bar Solid Interlocking Panels Accordion

Rotating Bar Design Corner plate with series of 3 bars on each Last bar interlocks with bar on opposing side Vinyl-like fabric secured around the bar cage Snaps in 3 locations; one for each size monitor

Rotating Bar Design Advantages –Flexible to different monitor sizes –Projected cost –Ease of storage Disadvantages –Slightly cumbersome setup for client –Possible instability

Solid Interlocking Panel Design Adjustable solid frame provides support for sides Solid side panels slide out Top/bottom are cloth with multiple sets of snaps

Solid Interlocking Panel Design Advantages –Sturdy construction –Easy depth adjustment –Easy to set up Disadvantages –Leaves a larger footprint –Front plate may hinder stereoscope adjustability –Most costly design

Accordion Design Retractable Hood Elastic Connections Between Corners Detachable Viewing Window

Accordion Design Advantages –Flexible Storage –Range of Size –Simple to Use Disadvantages –Preparation Time –Conflicts with Normal Viewing

Design Matrix* Criteria Rotating Bar Design Solid Interlocking Panels Design Accordion Design Ability to Block Light 333 Flexibility 445 Projected Cost 423 Ease of Storage 443 Ease of Use for Client 243 Ease of Manufacturing 3.52 Total *Scale: 1-5 1: Poor 3: Satisfactory 5: Outstanding

Future Work Design Feedback and Modifications Research and Materials –Fabric –Measurements Develop Prototype

References ARIC Grading Protocol – Lightbox. Fundus Photograph Reading Center Sept T_995.html Fundus Photograph Reading Center. University of Wisconsin-Madison Sept Hafford, Dennis. Client Meeting. 15 Sept Hafford, Dennis. to Authors. 20 Sept Screen Reflections. Think Pad IBM. 3 Oct Timmermeister, Jean. Have You Wondered About How to View Stereo Images?. PSA Journal. Nov What They Are and How They Work. Stereo Images from Juneau. 29 Sept

Questions?