There are two types of cells in the eyes that you actually see with, and they're called cones and rods.
the thing behind the pupil
You mean at the back of the eye, not behind it? If so, retina
A part in your eye
Assuming you mean the part of the eye responsible for seeing color... There are two types of photoreceptors in the retina: rods and cones. The cones are responsible for seeing color. (The easy way to remember it is cones and color start with c.)
in yor eye
The retina of the eye has rods and cones.
Your eye has cones and rods that are stimulated by light.
Rods are a part of the eye that takes in low light. Cones are located in the retina and they are responsible for seeing in color. All mammals have rods and cones in their eyes.
The eye's visual receptors reside within the retina. The eye's visual receptors consist of four different types of receptors including rods, blue cones, red cones and green cones.
You find rods and cones in the back of your eye near the retium
Rods and cones are found in the retina at the back of the eye. They are directly connected to nerve cells that lead into the brain.
3
cones