Nocturnal Humans have pretty good vision during the daytime but horrible during the nighttime in comparison to nocturnal animals. It makes sense that humans have better vision in daylight because they are more active during the day while nocturnal animals are more active at night. The eyes of the humans and nocturnal animals have specialized over time to help them better to adapt to the environment that they live in. The difference between how humans and nocturnal animals view, of course, lies in the different structure of the eye.
Nocturnal animals have proportionally larger eyes than humans do.
The pupils in their eyes open wider in dim light to absorb as much light as possible. The rods become more specialized while cones are more specialized in humans. Rods work in areas of low light to detect motion and basic visual information while cones work in areas of high light and register in details. Nocturnal animals have a structure in which human lack called tapetum. The tapetum amplifies the amount of light that reaches the retina.