Acute Retinal Necrosis vs. Progressive Outer Retinal Necrosis: A Comparative Analysis

Acute Retinal Necrosis (ARN) and Progressive Outer Retinal Necrosis (PORN) are two major clinical entities of necrotising herpetic retinitis, a severe and vision-threatening condition caused by herpes viruses. Both conditions lead to rapid retinal necrosis, but they differ significantly in their affected populations, clinical presentations, inflammatory responses, and prognoses. Understanding these differences is crucial for early diagnosis, appropriate treatment, and vision preservation.