Parts of the Eye
Your eyes contain several key structures that work together to create vision. The iris is the colored part of your eye that gives you those blue, green, hazel, or brown eyes you're known for. Covering the iris is the cornea, a clear protective layer made of water and collagen that's kept moist by your tears.
In the middle of your iris sits the pupil, that black circle that expands and contracts to control how much light enters your eye. The sclera is the white part surrounding your iris, while the conjunctiva is a thin clear tissue covering the sclera and lining your eyelids.
Behind your pupil sits the lens, which focuses incoming light and directs it to the back of your eye. Think of your lens like the lens in a camera, adjusting to help you see objects both near and far.
Did you know? Your pupil can change size almost instantly! In bright light, it shrinks to protect your eye, while in darkness, it expands to let in more light – similar to how a camera aperture works.
