Light and the Human Eye Page 61 of INB EQ:  How do the Iris and Retina work together to allow us to see objects and colors?

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Presentation transcript:

Light and the Human Eye Page 61 of INB

EQ:  How do the Iris and Retina work together to allow us to see objects and colors?

 The Eye is made up of 2 Convex lenses.  The cornea is a convex lens on the outside of the eye.cornea  The pupil is the dark opening into the interior of the eye.pupil  The iris is the colored part of the eye.iris

 The retina is a layer of light-sensitive cells in the back of the eye.retina  -Chemical reactions produce nerve signals that are sent to the brain.  Rod cells and cone cells.  Rod cells enable people to see objects in dim light.  Cone cells enable people to see colors.

 The color of an object depends on the wavelengths of the light waves it reflects.  An object absorbs some light waves and reflects others.