How Vision Works

How Vision Works Image

Having the ability to see arises out of the complicated interplay of our eyes, the optic nerve and our brains. Not only do our eyes have to be able to simultaneously focus on an object, but they also have to then transmit what they see to the optic nerves, which then carry that message to our brains. At this point, our brains have to identify what we see. For most people, this process happens in less than a second.

However, any disruption in this path can impair your vision. Understanding the various parts and functions of each organ that contributes to vision is important to keeping your eyesight in good condition.

In this section, we explain how vision works, including information and tips on keeping your eyes healthy. Our articles inform you about the common malfunctions that impair vision while providing advice on how to prevent these impairments.

Eye Anatomy

Our eyes are made up of three layers of tissue and each has its own unique functions. While the outer layer (known as the fibrous tunic) protects the eye and helps it keep its shape, the middle layer (known as the vascular tunic) cleanses the eye and helps block out damaging reflections.

Once light has passed through these first two layers, the third, innermost layer (known as the nervous tunic) perceives color and transmits messages to the optic nerve.

While this outline seems fairly simple, each of these layers can only work by the simultaneous function of various parts within them. For example, the nervous tunic can only transmit the right message to the optic nerve if the rods and cones are accurately performing their functions. Read on to learn more about the anatomy of the eye.