Eyes - EYES EVERYDAYSCIENCE ALINAAGHA BSMC2K10...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
EYES EVERYDAY SCIENCE  ALINA AGHA BS MC 2K10
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
What is basically an eye? The eye is an organ for  sensing light.
Background image of page 2
The retina is a thin layer of  tissue at the back of the eye  that contains millions of tiny  light-sensing nerve cells  called rods and cones, which  are named for their distinct  shapes. These cells in the  retina convert the light into  electrical impulses.  Vision begins when light rays are  reflected off an object and enter the  eyes through the cornea, the  transparent outer covering of the eye.  The iris, or  colored  portion of the  eye, opens  and to  regulate the  amount of  light passing  through. The light rays then pass through the lens, which actually changes shape so it can  further bend the rays and focus them on the retina at the back of the eye.
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 01/17/2012 for the course MASS COMMU 107 taught by Professor Masror during the Spring '11 term at College of E&ME, NUST.

Page1 / 7

Eyes - EYES EVERYDAYSCIENCE ALINAAGHA BSMC2K10...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online