MEHRAN UNIVERSITY OF

ENGINEERING & TECHNOLOGY

BIOMEDICAL DEPARTMENT

14BM08 14BM44 STATEMENT OF PURPOSE SUBMITTED TO RESPECTED SIR ABDUL QADIR

EyeMouse ELECTRO-OCULAR CURSOR CONTROL

Objectives: —The purpose of this paper is to Design and development of Hand free mouse. The main

objective was to create a mouse emulator, which is based on an Electro ocular gram (EOG).

Working principle of Electrodes; Five electrodes are used to detect the Horizontal and Vertical eye movement. The electric potentials generated by the

human eye are used to control the mouse cursor on the screen. An instrumentation amplifier is used to amplify EOG

signals. Microcontroller is used to control the cursor position on the Screen by using amplified EOG signals.

Motivation

In choosing our project, we hoped to develop a product that would have practical application and

could be used to actually help people. We decided a project that would be interesting and instructive

would involve motion tracking. After pitching several ideas based off of motion tracking to Bruce Land,

he told us of a measurement technique called electrooculography and mentioned he had the dry

electrodes needed to perform the associated measurements. As working principle of eletrodes are

cleared.

METHODOLOGY:

The eyeMouse is a proof of concept device using the principles behind EOG to control a cursor on a

monitor strictly with the user’s eyes. Using five electrodes placed on the head, the user can control the on-screen cursor simply by looking at the exact position they want the cursor to move. The goal of the

project was provide cursor control comparable to a traditional USB mouse providing the user with a

hands free method of interacting with their monitor. The hope was to successfully implement smooth and continuous control of a cursor to prove that such a device could be extended to be used to replace

a mouse for a computer screen.

DIAGRAM:

METHAMATICALLY

The voltage magnitude read by the electrodes were proportional to the angle the eyes of the user

moved. The potential change seen near the eyes is about 5-20 µV/ ͦ depending on the user and

environmental conditions. If the exact value of the potential change per degree of rotation could be

found through calibration, the voltage readings could easily be mapped to correspond directly to a

cursor position on the TV screen. The vector math required is rather simple and illustrated in Figure 2.

Example:Mathematicaly prespective figure Eye orientation with TV

With the angle θ known, mapping the cursor onto the TV screen merely requires a simple

trigonometric calculation. The value x on the TV screen the eye is looking at can be found by using the

equation:

EQUATION:

References:

https://books.google.com.pk/books?id=Nrti8Q7K1wwC

&pg=SA37-PA3&lpg=SA37-PA3&dq=ELECTRO-

OCULAR+CURSOR+CONTROL&source=bl&ots=JLNhrscUT

E&sig=-

KrLB8t1yaHIDpI1BbGZOdZ1Phg&hl=en&sa=X&ved=0ah

UKEwjtmZ299IrRAhUDOBoKHVG8BO44ChDoAQhBMAc#

v=onepage&q=ELECTRO-

OCULAR%20CURSOR%20CONTROL&f=false

https://people.ece.cornell.edu/land/courses/ece4760/F

inalProjects/f2014/skg73_wfh42/skg73_wfh42/