SIGHT VOCAB

2. Detector Cells Specialized neurons in the brain’s visual cortex that respond to specific visual features, such as edges, angles, shapes, or movement.
4. Sharpness or clarity of vision; how clear your eyesight is.
5. The process by which the eye’s lens changes shape to focus near or far objects on the retina.
8. A condition where distant objects are seen clearly but close objects appear blurry because the image focuses behind the retina.
11. Trichromatic Theory The theory that the retina has three types of color receptors (red, green, and blue) that combine to produce all the colors we see.

1. Theory The idea that color vision is controlled by three opposing color pairs: red–green, blue–yellow, and black–white. When one color in a pair is activated, the other is suppressed.
3. The actual color we see (like red, blue, or green), determined by the wavelength of light.
6. Photoreceptor cells in the retina that detect color and detail; they work best in bright light.
7. A condition where close objects are seen clearly but distant objects appear blurry because the image focuses in front of the retina.
9. Photoreceptor cells in the retina that detect black, white, and gray; they work best in dim light and help with night vision.
10. Constancy The ability to see consistent colors even under different lighting conditions (a red apple looks red in sunlight and shade).