How Far Can You See?

4.0 based on 24 ratings

Updated on Aug 31, 2012

Grade Level: 7th-9th Type: Physical Science


In this experiment, will we see how far the average human can see.

Research Questions:

  • What causes the need to wear glasses in humans?
  • How does the brain work with the eyes?


  • Multiple eye charts, with different letters of the same sizes
  • Metersticks/yardsticks
  • Test subjects who do not wear glasses or contacts
  • Pen and paper for notes

Experimental Procedure

  1. Setup the experiment by placing yardsticks on the floor as a guide to your distance from the test subject.
  2. Hold up the eye chart in front of your test subject at two yards. Have your test subject read the letters to the best of their ability. Record the results.
  3. Change the eye chart. Move further away from the test subject and stand at three yards. Repeat the above step.
  4. Move further and further away at increments of one yard until the test subject can no longer read any of the letters, changing eye charts with every increment.
  5. Repeat steps 2-4 for all your test subjects.
  6. Evaluate your results.

Terms/Concepts: Human eyesight;, anatomy


Sofia PC is currently a college student with a deep interest in science who is aspiring to become a writer. She writes about all sorts of things across all subjects including, but not limited to; science, crafts, and fashion. She hopes to become a good writer so she can share her thoughts and experiences with the world and future generations.

How likely are you to recommend to your friends and colleagues?

Not at all likely
Extremely likely