In Herpes-Zoster keratitis, all of the following occurs except:
**Core Concept**
Herpes-Zoster keratitis is a viral infection of the cornea caused by the reactivation of latent varicella-zoster virus. This condition is characterized by inflammation and damage to the corneal tissue, leading to various clinical manifestations.
**Why the Correct Answer is Right**
Herpes-Zoster keratitis typically presents with unilateral involvement, and the corneal lesions often follow the distribution of the trigeminal nerve branches. The condition can cause severe ocular pain, photophobia, and decreased visual acuity. Inflammation and scarring of the cornea can lead to complications such as corneal ulcers and vision loss.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because Herpes-Zoster keratitis can indeed cause corneal edema, which is a common finding in this condition.
**Option B:** This option is incorrect because Herpes-Zoster keratitis can cause corneal thinning, which is a result of chronic inflammation and scarring of the corneal tissue.
**Option C:** This option is incorrect because Herpes-Zoster keratitis can cause corneal vascularization, which is a result of chronic inflammation and ischaemia of the corneal tissue.
**Clinical Pearl / High-Yield Fact**
Herpes-Zoster keratitis can be treated with antiviral medications, such as acyclovir and valacyclovir, and corticosteroids to reduce inflammation. Early treatment can help prevent complications and improve visual outcomes.
**Correct Answer: D.**