Skip to content

NIH Websites Are Changing

Beginning in late July, NIH will start introducing a new website experience designed to make it easier to find health information, research, funding opportunities, and other resources. During the transition, you may notice changes to navigation, page layouts, and where some information is located. Learn more in our Frequently Asked Questions.

The Visual System

Skip to NEI for kids content
The visual system

The Visual System: How Your Eyes Work

Skip video

 

Switch to video with audio description

Ever wonder how your eyes work? Watch this video to learn how you're able to see the world around you.

Last updated: December 10, 2025

Back to top