Opponent Process Theory: This theory suggests that our perception of color is determined by the activity of three pairs of opposing color processes - red-green, yellow-blue, and white-black.
Color Vision Deficiency (Color Blindness): A condition where individuals have difficulty distinguishing certain colors due to a deficiency or absence of specific cones in their retina.
Cone Cells: Specialized cells in the retina that detect different wavelengths of light and enable us to see colors.