1. The Blind spot
Hannah allen P.4

2. Photoreceptors
*Some are used to detect light while others
Are used to detect the absence of light (note
The different colors of the photoreceptors).
*These photoreceptors are arranged in certain
ways to help us recognize different objects.
*Each photoreceptor “circle” creates what is known a
a receptive Field which is connected to a certain cell
Retina that gives information to and from the brain al
us to Know what we are looking at and how bright it i
The dark ones
activate in the
absence of light
The light ones
activate in the
presence of light

3. Why is this important
to know?
The reason we
have a blind spot in
our eyes is because
that specific part in
our eye is MISSING

4. IN the optic nerve head, neurons come
together & travel in groups through the
“photoreceptor sheet” to form the optic
nerve! The problem with this is that The
optic nerve needs some way pass through
eye, thus causing there to be no
photoreceptors in the part it exits... this is
Where your blind spot is!
Optical nerve head

5. Center of vision
*Blind spot
THE
Parts
Of
The
Eye
Pupil
Retina
Optic nerve
LE
Right

6. Test your blind spot! Cover
your left eye with your hand
and stare directly into the
cross... Move your attention
left until the dot disappears

8. Why don’t you
regularly notice your
blind spot?
blind spot
Left eye vision
Right eye vision