??????? ???? ????? ? ???? ???? ?????? ?????????????Differentiation in between arteritic and non-arteritic PION is analogous to the process of differentiation in AION. In people more than the age of 50 with arteritic PION, elevations of serum erythrocyte sedimentation level (ESR) and C protein (CRP) are helpful in diagnosis. A serum CRP along with E