Which eye structure protects the outside of the eye?

Which eye structure protects the outside of the eye?

The eye’s outer layer is made of dense connective tissue, which protects the eyeball and maintains its shape. It is also known as the fibrous tunic. The fibrous tunic is composed of the sclera and the cornea. The sclera covers nearly the entire surface of the eyeball.

What provides protection for the outer aspect of the eye?

Sclera: the tough, opaque tissue that serves as the eye’s protective outer coat. Vitreous: the transparent, jelly-like substance that fills the eye’s cavity. It is composed mainly of water and helps to maintain the shape of the eye.

What is the protective outer layer of the eye called?

The outer covering of the eyeball consists of a relatively tough, white layer called the sclera (or white of the eye). Near the front of the eye, in the area protected by the eyelids, the sclera is covered by a thin, transparent membrane (conjunctiva), which runs to the edge of the cornea.

What are the protective parts of the eyes?

The orbit, eyelashes, eyelids, conjunctiva, and lacrimal glands help protect the eyes.

What is the covering of the eye?

The outer layer of the eyeball is a tough, white, opaque membrane called the sclera (the white of the eye). The slight bulge in the sclera at the front of the eye is a clear, thin, dome-shaped tissue called the cornea. The middle layer is the choroid.

What is the covering of your eye called?

Conjunctiva. The conjunctiva is the clear covering (like cellophane) of the white part of the eye, the sclera.

How are eyes protected?

The visible part of the eye is protected by the eyelids and the eyelashes, which help keep dirt, dust, and even harmful bright light out of the eye. Eyes are also protected by tears, which moisten them and clean out dirt, dust, and other irritants that get past the defenses of the eyelashes and eyelids.

Does the cornea protect the eye?

Cornea and sclera constitute the outer covering or coat of the eyeball. The main purpose of this coat is to protect structures inside the eye. The cornea is a transparent avascular tissue that acts as a structural barrier and protects the eye against infections.

What is the coating on the eye?

Like the glass on a watch, the cornea is the clear protective coating on the front of the eye that allows light to pass through it without distortion. It covers the colored iris. The lens of the eye focuses the images transmitted through the cornea to the retina.

Is outermost protective cover?

Explanation. The outer covering, a protective tough white layer called the sclera (white part of the eye). The conjunctiva covers the exposed part of the eye. The sclerotic layer is the eye’s outermost layer, which protects and shapes the eye.

How do tears protect the eye?

Tears keep your eyes wet and smooth, and help focus light so you can see clearly. They also protect your eyes from infections and irritating things, like dirt and dust. Every time you blink, a thin layer of tears called a “tear film” spreads across the surface of your cornea (the clear outer layer of the eye).

What are the two structures that protect your eyes from foreign particles?

The eyelashes and eyelid protect the eye from dust, dirt and sand particles. The blink reflex is the body’s quick response to anything touching the eye. In a blow to the face, the bony structure often prevents trauma to the eye itself.

How are the eyelids protective of the eye?

When closed, the eyelids help trap the moisture against the surface of the eye. Small glands at the edge of the upper and lower eyelids secrete an oily substance that contributes to the tear film and keeps tears from evaporating.

How do tears protect the surface of the eye?

Tears keep the surface of the eye moist. Without such moisture, the normally transparent cornea can become dried, injured, infected, and opaque. Tears also trap and sweep away small particles that enter the eye.

How does the conjunctiva protect the front of the eye?

On the moist back surface of the eyelid, the conjunctiva loops around to cover the front surface of the eyeball, right up to the edge of the cornea. The conjunctiva protects the sensitive tissues underneath it. When blinked, the eyelids help spread tears evenly over the surface of the eye.

What are the bony features of the eye?

The bony structures of the orbit (the bony cavity that contains the eyeball and its muscles, nerves, and blood vessels, as well as the structures that produce and drain tears) protrude beyond the surface of the eye.