Measuring Your Blind Spot

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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.

Quick Guide

Preparation Time:
Under 5 minutes
Learning Time:
5 to 10 minutes
Estimated Materials Cost:
1 cent - $1 per student
Age Range:
Ages 11 - 18
Resource Type:
Activity
Language:
English

Materials List (per student)

  • Pencil
  • Piece of notebook paper
  • Ruler
  • Pencil eraser
  • Calculator (optional)

Keywords

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
  • The Nature of Science
    • The Scientific Process
      • Conducting Investigations
      • Gathering Data

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