Which structure protects the lens and maintains the posterior chamber of the eyeball?

• A. Aqueous Humor
• B. Vitreous Humor
• C. Choroid
• D. Retina

Answer: (B)

Vitreous humor is the clear gel that fills the space behind the lens and in front of the retina. This gel provides structural support, helping keep the eyeball’s shape and holding the lens and other internal structures in place. By occupying this posterior region, it protects the lens from movement and helps maintain the stability of the posterior segment of the eye.

Aqueous humor circulates in the anterior and posterior chambers in front of the lens, nourishing tissues and helping regulate pressure, but it does not fill the space behind the lens. The choroid is the vascular layer that supplies blood to the outer retina and absorbs light, not a protective medium for the lens. The retina is the light-sensitive layer at the back of the eye, not a structure that protects the lens.