This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
PSM Lense of the eye interpreting two simultaneous light sources. Lense of the eye interpreting two simultaneous light sources archive org Popular Science Monthly Volume Author PDold Popular Science Monthly illustrations Optics
Page 2023 Free-images.com. All images are Public Domain