Computer Controlled Eyes for Human Patient Simulator

Silviu DiaconuEmad ElsamadicyAnas OthmanAzreena Ahmad Shukri

Group 8

Advisor : Ray Booker

Problem Statement

Trauma care physicians rely on realistic medical simulators to expose them to life-threatening situations before treating on real patients

ED physicians express concern that current human patient simulators inadequately simulate physiological responses of the eyes.

Problem:

How to design a cost-effective realistic eye simulator that can implement a broad range of anatomical capabilities ?

Performance Criteria

1. Size: Needs to fit SimMan’s eye sockets

2. Control/Response-Time : Must be externally controlled Should have minimal delay when reacting

to user input

3. Functionality: Must perform basic eye function

Movement (Full range) Pupil dilation/constriction (1 - 10 mm)

Speed Pink eye/ Redness (intensity) Blinking (Eyelids)- Reaction

Current eye simulators

$300 ~ $2000 Limited functions

Movement Blinking

Mechanical Eyes Standalone Eye Simulator

$1100 (golimbs.com) Fundoscopic Exams using

slides Separated from SimMan

Our Solution Proposal

Using microdisplay technology we can implement 3D-graphics to model anatomical eye features and specific physiological responses required.

Goals & Factors

Develop a cost-effective computer-controlled eye simulator that is esthetically pleasing and realistic

Using micro-displays lowers both cost and maintenance than current eye simulators

3D graphics offers an effective method that can increase both the quality and number of various physiological response necessary for a realistic medial scenario.

Initial Experimental Setup

Micro-display Controller

PC

(3D Graphics Software)

Joystick Controller

eMagin OLED

LCD

OLED

Hardware : LCD Screen Lilliput 212GL-18NP

1.8”, 4:3 TFT LCD LCD size : 1.7” x 2” Circuit Board size : 3” x 2” Resolution : 116,160 (dots) Video Input : Composite Power supply: 8V $59.99 (eio.com)

Limitations FFC Cable Circuit Board Size (Extra functions) Heat generation from Backlight

SimMan Head DimensionsTOP VIEW

FRONT VIEW

1.7”

1.5”

ABA = 4.1”

B = 0.8”

Dimensions Limited space

LCD & Circuit Board Virtualize implementation of

LCD screen and circuit board using 3D Studio Max

3D Studio Max

Create 3D Model Eyeball & Eyelids

Problems Rendering delay Motion capture control

Solution 3D Game Engine (DirectX

or OpenGL)

Demo

Current Setup

Lilliput 1.8” screen

3D Studio Max

3D game engine(DirectX)

Mapped Keyboard

Video Output

Hardware Software

SymmetricalVideo Feed

Controls

3D Object

VGA to Component Adapter

Current Work

Meeting with Prof. Bodenheimer to discuss 3D studio max integration with game engine

Animating pupil dilation and constriction

Finding best way to fit LCD screen into SimMan head

Meeting Philip Davis of ME Machine Shop to discuss how to cut SimMan’s head properly

Future Work

Further model detailed 3D images of the eye including the retina.

Begin cutting SimMan head to fit in LCD screen

Test eye functionality by using real-time simulation

Survey physicians to validate performance.