The document describes the main parts of the eye including the cornea, iris, pupil, aqueous humor, lens, vitreous humor, retina, and optic nerve. It explains that the cornea focuses light like a camera lens, the iris controls the pupil size to regulate light, and the lens bends light to enable vision. Rods and cones in the retina detect light and color. Protection features of the eye include eyebrows that prevent sweat from entering, eyelashes that collect particles, and tears that keep the eye clean and moist.

1. Parts of the Eye

2. • Cornea: The cornea is a clear white
covering over the outside of the eye. It helps
the eye focus like a lens on a camera.
• Iris: The iris is the part of your eye that has
color. It gets bigger and smaller to control
the different amounts of light entering the
eye.
• Pupil: Black opening in the middle of the
eye. Light comes through this opening.
• Aqueous humor: The aqueous humor is
clear water-like substance that keeps your
eye clean. It also provides nutrition an gives
shape to cornea

3. • Lens: The lens bends light. This helps the
eye see close up and far away things.
• Vitreous Humor: The vitreous humor is
clear water-like substance in the back of your
eye and gives shape to eyeball.
• Retina: The retina has nerve cells called
rods and cones that detect light. It is in the
back of your eye.
• Optic Nerve: The optic nerve carries
electrical signals from your retina to your
brain so you can see.

4. Rods and Cones
Rods and cones are special
cells that process light.
Rods and cones are extremely
small. In fact, there are
about 120 million rods and 7
million cones in each eye!
Rods help us see black and
white and shades of grey.
Cones help us see color. You
have three kinds of cones
are - red, green, and blue.
These cones work together
to help us see millions of
colors.

5. Protection Because the eye is such an important
and complex part of our body, we have many features
which protect the eye.
• The eyebrows are the strips of hair above your eyes
which prevent sweat from running into them.
• Eyelashes help keep the eye clean by collecting
small dirt and dust particles floating through the air.
The eyelashes also protect the eye from the sun's
and other light's glare. The eyelids sweep dirt from
the surface of the eye. The eyelid also protects the
eye from injury.
• Tears are sterile drops of clean water which
constantly bathe the front of the eye, keeping it clean
and moist.

6. Protection Because the eye is such an important
and complex part of our body, we have many features
which protect the eye.
• The eyebrows are the strips of hair above your eyes
which prevent sweat from running into them.
• Eyelashes help keep the eye clean by collecting
small dirt and dust particles floating through the air.
The eyelashes also protect the eye from the sun's
and other light's glare. The eyelids sweep dirt from
the surface of the eye. The eyelid also protects the
eye from injury.
• Tears are sterile drops of clean water which
constantly bathe the front of the eye, keeping it clean
and moist.