Open-and-go lessons that inspire kids to love science.

Sign up now for tons of free lessons like this one!

Back > Share
What do people who are blind see?
Human Machine Unit | Lesson 2 of 4

What do people who are blind see?

Human Machine Unit | Lesson 2 of 4
Lesson narration:
Scroll for prep
Full Screen
Controls Icon Exit Full Screen

DISCUSS (1 of 3):

Why do you think some people have problems with vision?

Full Screen
Controls Icon Exit Full Screen

DISCUSS (2 of 3):

How could we figure out how eyes work?

Here’s what we came up with...

Full Screen
Controls Icon Exit Full Screen

DISCUSS (3 of 3): Look at these eyes, and the eyes of the person next to you. What's the same? What's different?

Eyes Comparison

Do you think that any of the differences could explain why some people have trouble with vision, or not?

Full Screen
Controls Icon Exit Full Screen
Full Screen
Controls Icon Exit Full Screen
Full Screen
Controls Icon Exit Full Screen
Full Screen
Controls Icon Exit Full Screen
Full Screen
Controls Icon Exit Full Screen
Full Screen
Controls Icon Exit Full Screen
Full Screen
Controls Icon Exit Full Screen
Full Screen
Controls Icon Exit Full Screen
Full Screen
Controls Icon Exit Full Screen
Full Screen
Controls Icon Exit Full Screen
Full Screen
Controls Icon Exit Full Screen
Full Screen
Controls Icon Exit Full Screen
Full Screen
Controls Icon Exit Full Screen
Full Screen
Controls Icon Exit Full Screen
Full Screen
Controls Icon Exit Full Screen
Full Screen
Controls Icon Exit Full Screen
Full Screen
Controls Icon Exit Full Screen
Full Screen
Controls Icon Exit Full Screen
Full Screen
Controls Icon Exit Full Screen
Full Screen
Controls Icon Exit Full Screen
Full Screen
Controls Icon Exit Full Screen
Full Screen
Controls Icon Exit Full Screen
Full Screen
Controls Icon Exit Full Screen
Full Screen
Controls Icon Exit Full Screen
Slide Image
Full Screen
Controls Icon Exit Full Screen

vision


1 of 12

the ability to see
Full Screen
Controls Icon Exit Full Screen
Slide Image

light


2 of 12

what comes from the Sun and lamps and makes it possible to see things
Full Screen
Controls Icon Exit Full Screen
Slide Image

pupil


3 of 12

the dark opening in the center of the eye
Full Screen
Controls Icon Exit Full Screen
Slide Image

iris


4 of 12

the colored part of the eye that is shaped like a donut
Full Screen
Controls Icon Exit Full Screen
Slide Image

cornea


5 of 12

the clear layer in front of the eye
Full Screen
Controls Icon Exit Full Screen
Slide Image

retina


6 of 12

the back of the eye that senses light and sends messages to the brain
Full Screen
Controls Icon Exit Full Screen
Slide Image

structure


7 of 12

the specific form and shape of something
Full Screen
Controls Icon Exit Full Screen

function


8 of 12

what something does
Full Screen
Controls Icon Exit Full Screen

lens


9 of 12

a clear object that changes the direction of light as it passes through
Full Screen
Controls Icon Exit Full Screen
Slide Image

experiment


10 of 12

a test used to discover new information about a question
Full Screen
Controls Icon Exit Full Screen
Slide Image

model


11 of 12

a pretend version of something that scientists use when the real thing is too big, small, or complicated to work with
Full Screen
Controls Icon Exit Full Screen
Slide Image

dissect


12 of 12

to take something apart to study it
Full Screen
Controls Icon Exit Full Screen
🎉 That’s it for this lesson! How did it go?
Sign up now for more great lessons!
Full Screen
Controls Icon Exit Full Screen

Image & Video Credits

Mystery Science respects the intellectual property rights of the owners of visual assets. We make every effort to use images and videos under appropriate licenses from the owner or by reaching out to the owner to get explicit permission. If you are the owner of a visual and believe we are using it without permission, please contact us—we will reply promptly and make things right.

Exploration
blind man by TommyEdisonXP , used under CC BY
cat in window by Chris Lattuada , used under CC BY / Heavily modified
glasses by Michelle Arseneault , used under CC BY-SA / Adjusted color, cropped
cow by Peggy Greb
Activity
race car by The Tire Zoo , used under CC BY
light switch by Derek Gavey , used under CC BY-SA
man standing in front of curtains by Maegan Tintari , used under CC BY-SA
Other
Unit: brown eye by Giulia Marotta , used under Public Domain
Lesson narration:

Grade 4

Human Body, Vision, & The Brain

Light, Eyes, & Vision

4-PS4-2, 4-LS1-1

Activity Prep

Print Prep
In this lesson, students discover the basics of how their eyes work, and figure out some of the causes of vision problems. In the activity, Eye Model, students develop a working model of a human eye. They use a magnifying lens as a model of the cornea to explore how the structure of this lens is related to the function of our eyes.
Preview activity

Exploration

21 mins

Wrap-Up

4 mins

Grade 4

Human Body, Vision, & The Brain

Light, Eyes, & Vision

4-PS4-2, 4-LS1-1

Slow internet or video problems?