Introduction
Herpes Zoster Ophthalmicus (HZO) is a reactivation of the varicella-zoster virus (VZV) affecting the ophthalmic branch of the trigeminal nerve. It can lead to significant ocular complications if not promptly diagnosed and treated.

A cataract is the opacification of the crystalline lens, leading to progressive visual impairment. It is the most common cause of reversible blindness worldwide.