Human Eye

teaching resources


The human eye works like a camera. A camera needs a lens, image sensor, and SD card.

The human eye needs a properly working iris, lens, and retina.

The iris of your eye works like the lens of the camera. The iris controls the amount of light entering your eye.

The iris contracts or tightens when exposed to bright light, causing the pupil to get bigger or smaller.

The lens of your eye works like the image sensor in a camera. It takes the image being sent into the eye and focuses it onto the back wall of the retina.

The retina acts much like the SD card in a camera; it is where the image is recorded.

The image is upside down when it reaches the retina.

The retina sends signals to the visual cortex in the brain where the image is turned right-side up.

Download the FREE 55+ page Human Eye Anatomy lesson for multiple grades.


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