Several different approaches have been explored in developing a system to track eye movements. These approaches span from measuring reflections of infrared light to using advanced imaging techniques to monitor specific features within the eye. While a variety of reports exist on measuring infrared reflections off of the eye, the long term effects of illuminating the eye with infrared LED still remains questionable. Eye tracking has been successfully implemented using video and imaging techniques; however, the implementation of such a system is quite complex and requires advanced knowledge of such types of signal processing.

1. MEHRAN UNIVERSITY OF
ENGINEERING & TECHNOLOGY
BIOMEDICAL DEPARTMENT
14BM08
14BM44
STATEMENT OF PURPOSE SUBMITTEDTO RESPECTED SIR ABDUL QADIR
EyeMouse
ELECTRO-OCULAR CURSOR CONTROL
Objectives:—The purpose ofthis paper is to Design and developmentofHand free mouse.The main
objective was to create a mouse emulator,which is based on an Electro ocular gram (EOG).
Workingprinciple of Electrodes;
Five electrodes are used to detect the Horizontal and Vertical eye movement.The electric potentials generated bythe
human eye are used to control the mouse cursor on the screen.An instrumentation amplifier is used to amplifyEOG
signals.Microcontroller is used to control the cursor position on the Screen by using amplified EOGsignals.
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.

2. 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 w ant 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.

3. 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:

4.  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/