Sometimes your eyes play tricks on you. Can you figure out these optical illusions?
Optical Illusions
Batters Matter
Baseball is the leading cause of sports-related eye injury in kids 14 and younger.
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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.