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In this activity, learners calculate the width (horizontal diameter) of the blind spot on their retina. Learners make a blind spot tester using a piece of notebook paper. They use simple geometry of similar triangles to calculate the size of the blind spot.
- Under 5 minutes
- 5 to 10 minutes
- 1 cent - $1 per student
- Ages 11 - 18
- Activity
- English
Quick Guide
Materials List (per student)
- Pencil
- Piece of notebook paper
- Ruler
- Pencil eraser
- Calculator (optional)
Subjects
-
Life Sciences
- Cells
-
Human Body
- The Brain and Nervous System
-
Human Senses and Perception
- Vision
- Perception
-
Mathematics
-
Algebra
- Equations and Inequalities
- Variables and Expressions
-
Data Analysis and Probability
- Data Analysis
- Data Collection
-
Geometry
- Plane Geometry
- Measurement
-
Algebra
-
The Nature of Science
-
The Scientific Process
- Conducting Investigations
- Gathering Data
-
The Scientific Process
Audience
To use this activity, learners need to:
- see
- read
- touch
Learning styles supported:
- Involves hands-on or lab activities
Other
This resource is part of:
Access Rights:
- Free access
By:
- Chudler, Ph.D., Eric H.
Rights:
- All rights reserved, Eric H. Chudler, 2009