How many rods are present in a single retina?

The retina contains approximately 125 million rods, which are specialized photoreceptor cells that play a crucial role in vision, particularly in low-light conditions. Rods are highly sensitive to light and allow us to detect shapes and movement in dim light, although they do not contribute to color perception. This high number of rods enables the human eye to function effectively in various lighting situations, especially at night or in dark environments, making them essential for night vision. The other choices significantly underestimate the number of rods present in the retina, which highlights the fact that the quantity is far greater than just a few million.