**Core Concept**
Herpes zoster, also known as shingles, is a viral infection caused by the reactivation of the varicella-zoster virus, which remains latent in the dorsal root ganglia after a primary infection of chickenpox. The ocular symptoms of herpes zoster are primarily related to the involvement of the trigeminal nerve (cranial nerve V), which is responsible for sensory innervation of the face, including the eye.

**Why the Correct Answer is Right**
The correct answer is because the ocular symptoms of herpes zoster are typically associated with involvement of the trigeminal nerve, specifically the ophthalmic division (V1). The most common ocular symptoms of herpes zoster include conjunctivitis, keratitis, uveitis, and retinitis, which are all related to the involvement of the trigeminal nerve. The other ocular structures, such as the optic nerve (II), are not typically affected by herpes zoster.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because herpes zoster can cause ocular symptoms such as conjunctivitis and keratitis, which are related to the involvement of the trigeminal nerve.
**Option B:** This option is incorrect because herpes zoster can cause uveitis and retinitis, which are related to the involvement of the trigeminal nerve.
**Option C:** This option is incorrect because herpes zoster can cause optic neuritis, which is related to the involvement of the optic nerve (II), but this is not a typical ocular symptom of herpes zoster.

**Clinical Pearl / High-Yield Fact**
Herpes zoster ophthalmicus is a serious condition that requires prompt medical attention, as it can lead to permanent vision loss if left untreated. The Ramsay Hunt syndrome, which is a variant of herpes zoster that affects the geniculate ganglion, can cause facial paralysis, hearing loss, and vertigo in addition to ocular symptoms.

**Correct Answer: C. Optic neuritis**