Our eyes have two type of cells....the rod cells and the cone cells. The rod cells are photosensitive and respond to different wavelengths of light and this help in color vision. Cones are more active during day time. Then there are rods they are more active at night time that is they are also photoreceptors but they respond better to low or dim light. These cells that is rod and cone cells are present in the retina of eyes of mammals.
The human retina has two types of cells – rods and cones. Rods, a type of photo-receptors, usually work at low light. Rods are important for night vision because only a few photon particles (present in lights) can activate the rod cells. The human eye has over 100 million of rod cells.