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The Sight. By Eva Guzmán 6ºA. Index. How does the eye works Activities. Characteristics and function of the eyes. Parts of an eye. The eyes have got diferent colors such us blue , brown or green. Characteristics and functions of the eyes. - PowerPoint PPT Presentation
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Index1) Characteristics
and function of the eyes.
2) Parts of an eye
3) How does the eye works
4) Activities
• Your sense of sight
lets you see things
with your eyes. Your
eyes can detect
information about
the shape, colour
and location of
things around you.
The eyes have got
diferent colors
such us blue,
brown or green.
Characteristics and
functions of
the eyes
Go back
Parts of an eyeInterior
The cornea: is a transparent
layer of cells. It covers and
protects the iris and the pupil.
The lens: is behind the pupil
and the iris. It focuses light on
the retina.
The iris: is the colored part of
the eye, around the pupil. It's
made of muscle fibers that
open and close the pupil.
The pupil: is a small hole that
lets light go into the eye.
The retina: has got a thin
layer of optic cells that
detect light and colours.
These optic cells send
information to the optic
nerve.
Go back 1 Go back 2
How the eye works
1) Light goes into the eye
through the pupil. Then
it passes through the
lens.
2) The lens projects an
upside down image
onto the retina. The
optic cells in the retina
detect the light and
colours. Then they send
nerve impulses to the
optic nerve
3) The optic nerve transmit the nerve
impulses to the brain.
Finaly, the brain
interprets the impulses.
It also turns the image
the right way up again.
Go back