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Make a bright spot brighter.
Discover the outer limits of your eyes.
Your eye and brain hold on to a series of images to form a single complete picture.
Build a pinhole camera you can really get into.
Who needs expensive optical equipment to see better?
Your pupil changes size to control how much light enters your eye.
Keep an eye on your retinal blood supply network.
Control the (apparent) size of a hole with your brain.
Using two eyes gives you depth perception.
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
Attribution: Exploratorium Teacher Institute
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