P 300 Title: Anatomical limitations of optic disc contour digital image processing technique: Information loss study in brightness measurements (vascular area)

Purpose: ‘This study describes hemodynamic characteristics of the retrobulbar circulation in ten eyes with acute anterior ischemic optic neuropathy (AION), in order to better understand Ihe natural history of this disease. Methods: Color Doppler imaging was used to measure the peak systolic blood flow velocities and vascular resistance (resistive index) within the central retinal, ophtalmic, and posterior ciiiary arteries (PCA;I in two eyes with arteritic AION and eight eyes with non arteritic AION. Resulrs: In all cases, blood flow was detected in medial and lateral IPCA.There was a trend toward higher vascular resistance in the PCA of involved eyes compared with fellow eyes in non arteritic AION. In arteritic AION, central retinal and posterior ciliary artery vascular resistance was increased in both eyt?s compared with healthy eyer. Conclusion: CD1 provides velocimetric measurements of blood flow in the central retinal and posterior ciliary arteries, as produced by others authors, particularly in AION. IACHKAR Y. COHN Il. Arm-ROSA D