What are eye rods?

eye rods are cells that help eye processing. These cell types are also called photoreceptors . They are located in the retina, which is lining on the inside of the eye. Each human eye contains about 120 million rods. Another type of photoreceptor, eye cones, also process light. There are about 7 million eye cones in one human eye. Rods only see black, white and gray, so they do not help people distinguish colors. That's why people are unable to distinguish colors except shades of gray when there is no light. Before reaching optimal low lighting or dark vision, the rod may take 30 minutes or more. The cones adapt faster, but do not do it immediately. That is why things seem blurred and too clear when they move from the darkness to well lit, after spending several minutes or more minutes in the dark. There are three types of cones - one for blue, red and yellow. These different types of cones work together to allow people to see and recognize anotherColors, because all colors are some combination of these three primary.

The distinction of the shape and sensing of the object would not be possible without eye bars. The rods are also used more in peripheral vision than cones. Because the cones allow better visual resolution, people subconsciously adjust their eyes to use conical cells to focus on the object. This is why one can see a matte object when using its peripheral vision, but may not see it when it looks directly at the object.

A small part of the retina has no sticks or conical cells. This part is responsible for a blind spot. If someone closes one eye and focuses on one object, with another item a few centimeters away, an object that is not focused will disappear at a certain point in which the person moves his face closer to them. The zone in which the other object disappears is in a blind spot and is not visible.