Which bone, located near the lacrimal bone, helps form the medial wall of the orbit?

Which bone, located near the lacrimal bone, helps form the medial wall of the orbit?

• A. Sphenoid bone
• B. Ethmoid bone
• C. Lacrimal bone
• D. Zygomatic bone

Answer: (C)

Medial wall of the orbit is formed by several small bones, with the lacrimal bone making up the anterior portion closest to the lacrimal sac. Its position and thin structure allow it to contribute directly to the medial boundary, together with the posterior contribution from the ethmoid bone. The lacrimal bone sits right next to the lacrimal apparatus, so when a question describes a bone located near the lacrimal bone that helps form that wall, the lacrimal bone itself fits as the best answer. The other bones listed mainly shape other parts of the orbit: the sphenoid contributes more toward the posterior medial wall, the ethmoid also helps form the wall but is situated more medially, and the zygomatic bone forms the lateral wall.

Medial wall of the orbit is formed by several small bones, with the lacrimal bone making up the anterior portion closest to the lacrimal sac. Its position and thin structure allow it to contribute directly to the medial boundary, together with the posterior contribution from the ethmoid bone. The lacrimal bone sits right next to the lacrimal apparatus, so when a question describes a bone located near the lacrimal bone that helps form that wall, the lacrimal bone itself fits as the best answer. The other bones listed mainly shape other parts of the orbit: the sphenoid contributes more toward the posterior medial wall, the ethmoid also helps form the wall but is situated more medially, and the zygomatic bone forms the lateral wall.