The human eye is a fascinating organ in our bodies. Do you know how it works? In The Human Eye for Kids video, you will learn how exactly our eyes use light to create images. The muscles that make our eyes blink are the fastest-moving muscles we have! They are both voluntary and involuntary, so we can blink on purpose and blink as a reflex to bright light or dust in the air.
The reason we blink in the first place is that we need to keep our eyes clean. Blinking keeps dirt and other substances from getting in our eyes, and it helps keep them moist and not get too dry. Tears also help keep our eyes clean (and, of course, keep them from drying out). These important drops of water are made using the lacrimal glands.
The white part of your eye is the sclera, which is the outer covering of the eyeball that contains blood vessels that help blood flow to the eyeball. The cornea is a transparent dome in front of the colorful part of your eye. It helps your eye focus when exposed to light, kind of like a window. Something called the anterior chamber is the space between the cornea and iris that is filled with a transparent fluid that keeps the eye healthy.
Speaking of the colorful part of your eye, that is your iris. The iris works with the pupil, which is the black part of your eye, in an interesting way. Light travels through the iris before arriving at the pupil. Muscles attached to the iris change its shape to control the amount of light that gets through the pupil. The pupil is what lets light enter your eye. It gets bigger when we need more light and shrinks when there's plenty of light.
We hope you and your student(s) enjoyed learning about your eyes! If you want to learn even more, head over to our website and download one of our many free lesson plans about the human body, full of activities, worksheets, and more!
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What you will learn in The Human Eye for Kids:
0:00 Introduction to the eye
0:37 Eyes, why we blink, and what tears are for
1:33 The sclera, the cornea, and the anterior chamber
2:35 The color of eyes—iris and pupil
3:35 What happens when light enters the eye
4:41 The retina, rods and cones, and the optic nerve
5:37 Other important parts of the eye
6:21 Review of the facts
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