Expansion of assortment of drugs used for diagnosing cerebrovascular reserves and prognosticating vascular pathologies of optic nerve

208 gerontological patients with chronic encephalitic insufficiency, circulatory encephalopathy (CEP), were examined by using ultrasound Doppler sonography. 110 patients happened to have vascular pathology of optic nerve. While examining carotid arteries, use was made of an absolute increment value of carotid index AIC against the background of functional load (physical activity). The decrease of this value from -0.18 and down points to reduction in cerebrovascular reserves and possible disruption of regional circulation in the ophthalmic artery system.