From the surface inward, which is the correct order of corneal layers?

From the surface inward, which is the correct order of corneal layers?

• A. Epithelium, Bowman's membrane, Endothelium, Stroma, Descemet's membrane
• B. Epithelium, Bowman's membrane, Stroma, Descemet's membrane, Endothelium
• C. Epithelium, Bowman's membrane, Descemet's membrane, Stroma, Endothelium
• D. Epithelium, Bowman's membrane, Stroma, Descemet's membrane, Endothelium

Answer: (B)

From the surface inward, the cornea is organized as: epithelium first, providing a protective outer layer; beneath it, Bowman's membrane acts as a tough boundary; next comes the stroma, which forms most of the corneal thickness with its orderly collagen; then Descemet's membrane, the basement membrane of the endothelium; and finally the endothelium at the innermost surface that helps maintain corneal hydration. This makes the correct sequence epithelium, Bowman's membrane, stroma, Descemet's membrane, endothelium. The other options mix the positions of the endothelium and Descemet's membrane or move Descemet's ahead of the stroma, which does not match the actual anatomy.

From the surface inward, the cornea is organized as: epithelium first, providing a protective outer layer; beneath it, Bowman's membrane acts as a tough boundary; next comes the stroma, which forms most of the corneal thickness with its orderly collagen; then Descemet's membrane, the basement membrane of the endothelium; and finally the endothelium at the innermost surface that helps maintain corneal hydration. This makes the correct sequence epithelium, Bowman's membrane, stroma, Descemet's membrane, endothelium. The other options mix the positions of the endothelium and Descemet's membrane or move Descemet's ahead of the stroma, which does not match the actual anatomy.