https://www2.slideshare.net/SalmanAkram34/insight#summary/240474553/%3Frange%3D1m

4. External Structure:

5. Cheekbone.
Forehead.
Temple.
Side Of Nose.
Provides Protection To Eye.

11. Photo Receptors:
Rods:
Rods are Sensitive to dim
light.
They are Present everywhere
in the retina except the
fovea.
Allow dim light vision &
peripheral
vision.
There are about 125 million
rods in the average in
retina.
Cones:
Cones are Sensitive to
bright light.
It is found as Clusters
near the centre of
retina(fovea).
It Distinguishes colours &
allow sharp vision.
There are about 5 million
cones in the average
retina.

13. Fovea:
It Contains only cones & no rods.
It forms an extremely clear image.
It Is directed towards whatever
object we are studying most closely.

16. Optic Nerve:

17. Blood Vessels: