ORBITAL ULTRASOUND IN THE OCULAR ISCHEMIC SYNDROME

The ocular ischaemic syndrome illustrates well the effects of hypoperf usion of the globe and is a useful model for studying disorders of the orbital circulation. Recent advances in orbital ultrasound techniques have provided a non-invasive method of examining flow velocities in t he orbital vessels, particularly the ophthalmic artery. Orbital ultras ound studies were performed on 3 cases of the ocular ischaemic syndrom e. Continuous or intermittent reversal of blood flow in the ophthalmic artery was seen in all cases. How this phenomenon relates to the symp toms and signs in affected patients, and the role of orbital ultrasoun d in the investigation of the ocular ischaemic syndrome, are discussed .