Certified Ophthalmic Medical Technologist (COMT)

Answer: C - Clusters of fluid-filled blisters on reddened skin, open sores, and significant pain describes shingles.

Shingles is a painful skin rash produced by a viral infection induced by the reactivation of the varicella-zoster virus, which is responsible for chickenpox. The varicella-zoster virus, often known as herpes zoster, is a member of the herpesvirus family.