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The Eye Light passes through the pupil (black part) and lens then focuses on the retina on the back of the eye.

The Eye The retina is made up of cells called rods and cones which take the light and send signals to the brain.

The Eye Rods are sensitive to dim light and useful for seeing at night. Sometimes cause an “afterimage” to appear from bright or prolonged light. Click here for Afterimage Demonstrations

The Eye Cones are responsible for colors and shapes of objects. – 3 types: Red (Red  Yellow) Green (Yellow  Green) Blue (Blue  Violet)

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The Eye Color Blindness occurs when the cones do not properly distinguish colors of light. 8% of men 0.5 % of women Click for color palate demonstration Click for color changing demonstration

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Normal Protanomaly (Weak Red) Deuteranomaly (Weak Green)

Normal Protanopia (No Red) Deuternopia (No Green)

Normal

Protanope

Deuteranope