What type of vision do rods primarily contribute to?

Rods primarily contribute to night vision, which is also known as scotopic vision. These photoreceptor cells are highly sensitive to low light levels, making them essential for seeing in dimly lit environments. Unlike cones, which are responsible for color vision and function best in bright light, rods do not have the capability to perceive color and provide a more monochromatic view of the environment. They are more concentrated in the peripheral regions of the retina, which aids in detecting movement and shapes during twilight or nighttime conditions. Hence, when it comes to visual perception in low light, rods play a crucial role, allowing us to navigate and understand our surroundings in the dark.