**Question:** Herpetic keratitis is treated by

A. Antiviral medications (e.g., acyclovir, valacyclovir, or famciclovir)
B. Topical steroids to reduce inflammation
C. Antibiotics to treat bacterial superinfection
D. Topical lubricants for symptom relief only

**Correct Answer:** D. Antiviral medications (e.g., acyclovir, valacyclovir, or famciclovir)

**Core Concept:** Herpetic keratitis is an ocular infection caused by the herpes simplex virus (HSV) which affects the cornea. HSV can lead to inflammation, pain, and impaired vision if left untreated. Herpetic keratitis is typically managed with antiviral medications to suppress the viral replication and prevent further damage to the cornea.

**Why the Correct Answer is Right:** Antiviral medications, such as acyclovir, valacyclovir, or famciclovir, are specifically designed to target and inhibit the replication of herpesviruses like HSV-1 and HSV-2. By suppressing the viral replication, these medications help to reduce inflammation, prevent further corneal damage, and improve the prognosis of the patient.

**Why Each Wrong Option is Incorrect:**

A. Topical steroids (e.g., corticosteroids) are often used in the management of herpetic keratitis to reduce inflammation. However, using steroids alone may not directly target the viral replication and may delay the initiation of appropriate antiviral therapy, leading to worsened prognosis and increased risk of complications.

B. Topical antibiotics (e.g., fluoroquinolones) are typically used to treat bacterial superinfections in herpetic keratitis, not the primary viral infection itself. Antibiotics do not directly inhibit the herpes simplex virus replication and hence are not the primary choice for managing herpetic keratitis.

C. Topical lubricants (e.g., artificial tears) are used to provide symptomatic relief, like reducing ocular discomfort, pain, and tearing. While they may alleviate some symptoms, they do not target the primary viral infection and do not contribute to the resolution of the infection or prevent vision loss.

**Clinical Pearl:** In cases of herpetic keratitis, it is crucial to initiate appropriate antiviral therapy (e.g., acyclovir, valacyclovir, or famciclovir) as soon as possible to prevent severe ocular complications and visual impairment. Additionally, topical corticosteroids can be used in conjunction with antiviral agents to further reduce inflammation. However, antibiotics should not be used unless there is a confirmed bacterial superinfection. Topical lubricants may provide symptomatic relief but are not sufficient for treating herpetic keratitis.