Differential Diagnosis for Red Eye Post Zoster
- Single Most Likely Diagnosis
- Herpes Zoster Keratitis: This is a common complication of herpes zoster ophthalmicus, where the virus affects the cornea, leading to inflammation and redness of the eye.
- Other Likely Diagnoses
- Herpes Zoster Iritis: Inflammation of the iris caused by the herpes zoster virus, which can lead to redness, pain, and sensitivity to light.
- Herpes Zoster Conjunctivitis: Infection of the conjunctiva by the herpes zoster virus, resulting in redness, discharge, and irritation of the eye.
- Postherpetic Neuralgia: While not directly causing red eye, this condition can lead to discomfort and pain in the eye, which may be mistaken for redness or other ocular symptoms.
- Do Not Miss Diagnoses
- Acute Angle-Closure Glaucoma: A medical emergency that can be triggered by herpes zoster infection, characterized by severe eye pain, redness, and vision loss.
- Scleritis: Inflammation of the sclera, which can be caused by herpes zoster and leads to severe eye pain, redness, and tenderness.
- Endophthalmitis: A rare but potentially devastating infection of the inner eye that can occur after herpes zoster, requiring prompt treatment to preserve vision.
- Rare Diagnoses
- Malignant Glaucoma: A rare condition associated with inflammation and increased intraocular pressure, which can occur after herpes zoster infection.
- Phthisis Bulbi: A rare, end-stage condition where the eye becomes shrunken and non-functional due to chronic inflammation, potentially caused by untreated or severe herpes zoster infection.