Iris with a drawing and pencil. Printables

Printables

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Optical Illusions

Did you know?

Do your eyes glow red in photos? Red eye happens when the light of the flash reflects off of the retina, which is covered with tiny blood vessels. In a dim room, the pupil dilates (opens wide) to allow in more light. The more open the pupils are, the more red eye effect you get in your photos.