Whole blood viscosity (WBV), plasma viscosity (PV), hematocrit, erythrocyte sedimentation rate (ESR) and fibrinogen were assayed in 20 patients with traumatic optic nerve atrophy. The results of each item in the above examinations has been compared with that of the control group. It has been demonstrated that WBV, PV, ESR and fibrinogen in the patient group were significantly higher than that in the control group (P less than 0.01). But the ESR and fibrinogen of the treatment group were significantly lower than that in the pretreatment group (P less than 0.01). The authors suggest that the result of changes in hemorheology of traumatic optic nerve atrophy is a kind of reverse phenomenon.