A benign tumor in the orbit of a 49-yearold man compresses a structure that runs through both the superior orbital fissure and the common tendinous ring. Which of the following structures is most likely damaged?
1.Abducens nerve
2.Frontal nerve
3.Lacrimal nerve
4.Trochlear nerve
5.Ophthalmic Vein
Explanation:
The abducens nerve enters the orbit through the superior orbital fissure and the common tendinous ring. The trochlear, lacrimal, and frontal nerves and the ophthalmic vein enter the orbit through the superior orbital fissure outside the common tendinous ring