A complex system of nerves and muscles enables the human eye to blink, gaze, and shift focus. The trochlear nerve is one of six cranial nerves that carry electrical impulses from the brain to the eye.

Dear Doctors: I had an episode where it felt like my left eye went out of alignment and I couldn’t focus. A brain scan was clear, but the doctor said it’s cranial nerve palsy. He says it’s from a ...

The ophthalmic nerve is the first branch of the trigeminal nerve, which is also known as the fifth cranial nerve. The ophthalmic nerve supplies sensory innervation to the structures of the eye, ...