What is a comprehensive function of the corneal stroma?

What is a comprehensive function of the corneal stroma?

• A. To support structural and shape maintenance, maintain corneal transparency, maintain avascularity, and form a proteoglycan bridge for fibril spacing
• B. To generate tears
• C. To regulate tear film
• D. To form the Descemet's membrane

Answer: (A)

The corneal stroma mainly provides structural support to keep the cornea’s shape and mechanical integrity while also ensuring optical clarity. Its tightly organized collagen lamellae give the cornea the precise curvature needed for focusing, and the proteoglycan-rich matrix—containing molecules that regulate collagen fibril diameter and interfibrillar spacing—minimizes light scattering to maintain transparency. Being avascular helps prevent light interruption from blood vessels, further preserving clarity. Tears production and tear-film regulation come from the lacrimal glands and ocular surface tissues, not the stroma. Descemet's membrane is a basement membrane secreted by the corneal endothelium, not the stroma.

The corneal stroma mainly provides structural support to keep the cornea’s shape and mechanical integrity while also ensuring optical clarity. Its tightly organized collagen lamellae give the cornea the precise curvature needed for focusing, and the proteoglycan-rich matrix—containing molecules that regulate collagen fibril diameter and interfibrillar spacing—minimizes light scattering to maintain transparency. Being avascular helps prevent light interruption from blood vessels, further preserving clarity.

Tears production and tear-film regulation come from the lacrimal glands and ocular surface tissues, not the stroma. Descemet's membrane is a basement membrane secreted by the corneal endothelium, not the stroma.