It is almost like a sphere(almost round)
Its outer coat is white.
It is tough so that it can protect the interior of the eye from accidents.
The eye has many different parts like cornea,iris,pupil,lens,retina etc
Different Parts of Eyes
Cornea
Outermost layer is called Cornea
It is transparent
Iris
Behind the cornea, there is dark muscular structure
It is called iris
The colour of the iris of different people is different.
Some have brown eyes,some black,some blue
Pupil
In iris,there is a small opening called pupil
Lens
Behind the pupil,there is lens
Lens focuses light on the back of the eye on a layer
This is called retina
Retina
Layer on the back of the eye is called retina
Retina contains different nerve cells
Nerve Cells
There are 2 types of cells
- Cones - They are sensitive to bright light.
- Rods - They are sensitive to dim light
Example-An owl can see easily during the night because it has more rods on its retina than cones
Eagle(Day Bird) has more cones and fewer rods
Optic Nerve
Sensations felt by nerves are transmitted to the brain by optic nerve
Ciliary Muscle
It helps in changing shape of lens
This helps lens to focus
