## **Core Concept**
The infraorbital fissure is a significant anatomical passage in the orbit that allows communication between the orbit and the pterygopalatine fossa. It is located below the orbital floor and lateral to the infraorbital foramen. Several important nerves and vessels pass through this fissure.

## **Why the Correct Answer is Right**
The infraorbital fissure serves as a passage for structures that include the **infraorbital nerve** and vessels, but most notably, it allows passage of the **zygomatic nerve** (a branch of the maxillary nerve, V2), the **infraorbital vessels**, and the **nerve to the inferior oblique muscle**. However, the correct answer focuses on specific nerves and vessels. The **maxillary nerve (V2)** itself does not pass through the infraorbital fissure but rather the **infraorbital nerve**, a continuation of the maxillary nerve, does. Importantly, the **inferior ophthalmic vein** passes through the infraorbital fissure.

## **Why Each Wrong Option is Incorrect**
- **Option A:** Incorrect because while some nerves do pass through, the specificity and accuracy regarding the infraorbital fissure's contents are crucial.
- **Option B:** Incorrect as it might refer to a structure not primarily associated with the infraorbital fissure.
- **Option D:** Incorrect because it likely refers to another anatomical passage or structure not directly related to the infraorbital fissure.

## **Clinical Pearl / High-Yield Fact**
A key clinical point to remember is that the infraorbital fissure is a site through which anesthetic nerves can be approached for regional anesthesia, and it's also relevant in the spread of infections from the face to the orbit. The **infraorbital nerve** provides sensory innervation to the skin of the mid-face.

## **Correct Answer:** C.