How Far Can You See?
Grade Level: 7th-9th Type: Physical Science
In this experiment, will we see how far the average human can see.
- 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
- Test subjects who do not wear glasses or contacts
- Pen and paper for notes
- Setup the experiment by placing yardsticks on the floor as a guide to your distance from the test subject.
- 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.
- Change the eye chart. Move further away from the test subject and stand at three yards. Repeat the above step.
- 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.
- Repeat steps 2-4 for all your test subjects.
- Evaluate your results.
Terms/Concepts: Human eyesight;, anatomy
- Ali, Mohamed Ather; Klyne, M.A. (1985). Vision in Vertebrates. New York: Plenum Press. p. 8. ISBN 0-306-42065-1.
Warning is hereby given that not all Project Ideas are appropriate for all individuals or in all circumstances. Implementation of any Science Project Idea should be undertaken only in appropriate settings and with appropriate parental or other supervision. Reading and following the safety precautions of all materials used in a project is the sole responsibility of each individual. For further information, consult your state’s handbook of Science Safety.