What is the mechanism of vision in dim light?

In dim light, vision primarily relies on rods, which are photoreceptor cells in the retina that are highly sensitive to low light levels. These rods contain a pigment called rhodopsin that enables them to detect light and contribute to night vision. When light enters the eye, it converts rhodopsin into a form that triggers a biochemical cascade, ultimately resulting in the transmission of visual signals to the brain. This process allows for perception in low-light conditions, although it provides less visual acuity and color discrimination compared to cones, which function optimally in bright light.