Question

after some investigation, we learned that before the accident Joe had seen a car run a red light before it hit him. Joe’s sense of vision allowed him to see the car run the red light.

**please explain whats the difference between color vision and distant vision ? (included the anatomy and physiology involved )

Answer 1

Distant vision and color vision are two very different phenomena that are not inter-related but occur simultaneously.

• Distant vision is based upon depth perception, i.e. how humans perceive distance and depth. This is achieved with the help of monocular cues (with one eye) such as relative distance between objects based upon their relative motion, relative size, aerial perspective based upon the contrast of light, etc. and binocular cues (with both eyes) such as the perception of the same objects from two different angles helps place them better in relativity.
  Anatomically, the eye can see different distances based upon the amount of relaxation of ciliary muscles of the eye.
• Based upon the wavelength of light from the visible spectrum that the eye is exposed to, color is perceived. It is the cone cells that are responsible for color vision.