What Are Eyeballs Made Of?

The video explains the unique structure of the eye, highlighting that it is not bone but a jelly-like collagen. The sclera and cornea are discussed as protective and light-admitting layers. The iris, pupil, lens, and retina are described as key components in focusing light and enabling vision. The vitreous humor, a gel-like substance, fills most of the eye's volume, providing support and shock absorption. The aqueous humor, located in front of the lens, nourishes the cornea and maintains eye shape. The cornea receives oxygen from tears, allowing it to function without blood vessels.

What is the primary function of the sclera in the eye?

• To control the size of the pupil

• To nourish the cornea

• To provide a protective outer layer

• To focus light onto the retina

Which part of the eye is responsible for controlling the amount of light that enters?

• Retina

• Cornea

• Iris

• Lens

What is the main role of the lens in the eye?

• To provide structural support

• To control the size of the pupil

• To absorb shock

• To focus light onto the retina

What is the vitreous humor primarily composed of?

• Nerve cells and proteins

• Water and collagen fibers

• Blood and hemoglobin

• Tears and oxygen

How does the cornea receive the oxygen it needs?

• Through blood vessels

• From the vitreous humor

• Through the aqueous humor

• From the gas dissolved in tears