What is the primary characteristic of dendritic lesions seen in herpes keratitis?

The primary characteristic of dendritic lesions seen in herpes keratitis is their branching structure. These lesions, which are caused by the herpes simplex virus, appear tree-like or dendritic when viewed under a slit lamp examination. This branching pattern reflects the way the virus affects the corneal epithelium, leading to the characteristic design of the lesions.

The dendritic shape is significant for diagnosis because it helps clinicians identify herpes keratitis specifically and distinguish it from other conditions that may affect the cornea. The appearance of these lesions is a direct result of the way the virus spreads along the nerve pathways within the cornea, which leads to the distinctive elongated dendrite-like projections.

Recognizing this branching structure is crucial for proper management and treatment, as it alerts the healthcare provider to the underlying infection that requires antiviral therapy. Understanding this characteristic allows for quicker diagnosis and more effective patient care.