Science

• Science
• Primary Education

The sense organs

Science 3

how many sense organs do we have?

The sense organs

Lesson 1: THE EYES

WHAT ENABLE US TO SEE THINGS AROUND US?

Our eyes are the sense organs for sight. They are very important because they enable us to see. They help you identify the characteristics of people, things and places around you. 

Objectives: 

At the end of the lesson, the pupils should be able to; 

• Identify the parts of the eyes

Parts of the eyes

Our eyes have both external and internal parts that work together even as each part has its specific functions. 

External parts

the external part of the eyes include the eyelids, eyelashes, sclera, cornea, pupil and iris. 

Eyelids

the eyelids serves to protect the front part of the eye. 

Eyelashes

Protects the eyes by keeping dirt and and other stuff from entering your eyes. 

Sclera

The sclera is the white part of your eyes. It serves as the protective coating of the eyes.

Sclera

Cornea

the cornea serves as the transparent covering of the eyes. it is the clear portion of your eyes that allows light to enter the eyes. 

Pupil

The pupil serves as the opening where light enters. It is the small black part in the center of the eyeball. 

Iris

the colored part of the eyes that surrounds the pupil. The muscles of the iris control how much light enters your eye. 

The color of the iris may range from black to gray, brown, blue or green. 

Internal parts of the eyes

the internal parts include the lens, retina, and optic nerve.

Lens

the lens focuses light and projects the image on the retina. 

Retina

is the part found at the back of the eye. The retina is where the image that is seen is focused. The retina sends the signals to your brain through passageways called optic nerves. 

Optic nerve

The optic nerve sends messages to the brain. Your brain then interprets these signals and processes the image of the object seen. 

Science book page 38

Assignment: 

Answer page 39

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