Printables
Eye Safety
Did you know?
Optical means vision. An illusion is something that isn’t what it seems to be. An optical illusion is something that plays tricks on your vision. Optical illusions teach us about how the eye and brain work together to create vision.
Important information about this site and your privacy.
See All You Can See is the National Eye Institute's website for kids. Please send general questions and comments to 2020@nei.nih.gov.
Some pages on this site link to PDF files. Download Adobe Reader to view and print PDF files.
Games on this site require Flash. Download Adobe Flash Player to view and play games.
See All You Can See is the National Eye Institute's website for kids. Please send general questions and comments to 2020@nei.nih.gov.
Some pages on this site link to PDF files. Download Adobe Reader to view and print PDF files.
Games on this site require Flash. Download Adobe Flash Player to view and play games.