Which of the following is NOT one of the three types of vision?

The distinction between types of vision is crucial in understanding how humans perceive their environment under different lighting conditions. Photopic, mesopic, and scotopic vision refer to the types of vision that occur under well-lit, transitional, and low-light conditions, respectively.

Photopic vision is associated with daylight conditions and primarily relies on cone cells in the retina, which are responsible for color perception and visual acuity. Mesopic vision occurs at dawn or dusk when both cone and rod cells are active; it allows for vision in intermediate light levels. Scotopic vision takes place in very low light conditions and relies on rod cells, which are more sensitive to dim light and primarily provide black-and-white vision.

Chromatic vision, on the other hand, is not a recognized category within the three types of vision. While it pertains to the perception of color, it does not represent a distinct type of vision under varying light conditions. The focus on photopic, mesopic, and scotopic vision categorizes human visual capabilities based on light intensity, making it clear that chromatic vision does not fit into this framework. Therefore, identifying chromatic vision as the option that does not belong among the three types highlights its lack of classification in the context of light-dependent vision types