Table 5.

Diagnostic criteria of acute retinal necrosis by the American Uveitis Society

Clinical characteristics that must be seen	Characteristics that support but are not required for diagnosis
One or more focus of retinal necrosis with discrete borders located in the peripheral retina (primarily involving the area adjacent to, or outside of, the major temporal vascular arcades). Rapid progression of disease (advancement of lesion borders or development of new foci of necrosis) if antiviral therapy is not given Circumferential spread of disease Evidence of occlusive vasculopathy with arteriolar involvement Prominent inflammatory reaction in the vitreous and anterior chambers	Optic neuropathy/atrophy Scleritis Pain

Clinical characteristics that must be seen

Characteristics that support but are not required for diagnosis

One or more focus of retinal necrosis with discrete borders located in the peripheral retina (primarily involving the area adjacent to, or outside of, the major temporal vascular arcades).
Rapid progression of disease (advancement of lesion borders or development of new foci of necrosis) if antiviral therapy is not given
Circumferential spread of disease
Evidence of occlusive vasculopathy with arteriolar involvement
Prominent inflammatory reaction in the vitreous and anterior chambers