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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
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DISCUSS (1 of 3):

Why do you think some people have problems with vision?

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DISCUSS (2 of 3):

How could we figure out how eyes work?

Here’s what we came up with...

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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?

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vision


1 of 12

the ability to see
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light


2 of 12

what comes from the Sun and lamps and makes it possible to see things
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pupil


3 of 12

the dark opening in the center of the eye
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iris


4 of 12

the colored part of the eye that is shaped like a donut
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cornea


5 of 12

the clear layer in front of the eye
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retina


6 of 12

the back of the eye that senses light and sends messages to the brain
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structure


7 of 12

the specific form and shape of something
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function


8 of 12

what something does
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lens


9 of 12

a clear object that changes the direction of light as it passes through
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experiment


10 of 12

a test used to discover new information about a question
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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
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dissect


12 of 12

to take something apart to study it
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Image & Video Credits

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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

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