The second cranial nerve is also known as the optic nerve. This nerve is responsible for transmitting visual information from the eyes to the brain. Other synonyms for the second cranial nerve include cranial nerve II, CN2, and optic tract. The optic nerve is an essential component of the visual system, and any damage to it can lead to vision impairment or loss. The second cranial nerve is also closely associated with conditions such as glaucoma and optic neuritis. It is important for medical practitioners and patients alike to understand the synonyms for the second cranial nerve for accurate diagnosis and effective treatment.