Oscar likes to run at night. even though it is dark, oscar can see because his eyes have specialized cells that convert the low levels of light energy into neural activity. these cells are known as

The retina is the back part of the eye that contains the cells that respond to light. These specialized cells are called photoreceptors. There are 2 types of photoreceptors in the retina: rods and cones.

The rods are most sensitive to light and dark changes, shape and movement and contain only one type of light-sensitive pigment.