Anatomy of the Eye Gallery of Photos

A Visual Guide to the Anatomy of the Human Eye

1
Basic Eye Anatomy

Extreme Close-Up Of Human Eye
Getty Images/Mitchell Smith/EyeEm

The anatomy of the eye is complex, consisting of several important parts. The ability to see is dependent on these parts working together. We use our eyes in almost every activity we perform. The eyes allow us to see shapes, colors, and dimensions of objects by processing the light they reflect. Our eyes are able to see in bright or dim light, but they cannot see objects when light is not present. The following image gallery is a guide to the many parts of the human eye and how they function.

Light enters the eye through the cornea, the clear layer covering the front of the eye. The cornea works with the lens of the eye to focus images on the retina. The upper and lower eyelids protect the eye from injury, with the eyelashes forming a protective barrier.

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External and Internal Eye Anatomy

Anatomy of an eye, illustration
Getty Images/BSIP/UIG

The cornea allows light to enter the eye. As light passes through the eye, the iris changes shape by expanding and letting more light through. Or, it constricts and lets less light through to change the size of the pupil. The lens then changes shape to allow the accurate focusing of light on the retina. Photoreceptors in the eye transmit nerve signals through the optic nerve to the brain. The brain processes these nerve impulses into sight.

3
Lateral Eye Anatomy

The close-up detail of the cornea illustrates its various layers, the epithelium, stroma and endothelium
The close-up detail of the cornea illustrates its various layers: the epithelium, stroma and endothelium. Getty Images/JACOPIN/BSIP

The cornea is the clear watch glass covering in the front of the eye. The cornea works with the lens of the eye to focus images on the retina. The retina captures the image and sends it to the brain to be developed. The retina is normally red due to its rich blood supply.

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Anatomy of the Eye Lens

Illustration of a cataract with its cloudy lens that does not allow light to reach the retina correctly.
Illustration of a cataract with its cloudy lens that does not allow light to reach the retina correctly. Getty Images/BSIP/UIG

The lens is responsible for making sure light rays come to a sharp focus on the retina. The lens of the eye is normally clear. If the lens becomes cloudy or is opacified, it is called a cataract.

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