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  2. Ophthalmic artery - Wikipedia

    en.wikipedia.org/wiki/Ophthalmic_artery

    The ophthalmic artery (OA) is an artery of the head. It is the first branch of the internal carotid artery distal to the cavernous sinus . Branches of the ophthalmic artery supply all the structures in the orbit around the eye , as well as some structures in the nose , face , and meninges .

  3. Carotid-cavernous fistula - Wikipedia

    en.wikipedia.org/wiki/Carotid-cavernous_fistula

    Selective angiography of the external carotid artery showing an indirect type D right carotid cavernous fistula, filling of the cavernous sinus (arrow) and retrograde drainage into the right superior ophthalmic vein (arrowhead) [1] This is based on MRI scan, magnetic resonance angiography and CT scan.

  4. Amaurosis fugax - Wikipedia

    en.wikipedia.org/wiki/Amaurosis_fugax

    Atherosclerotic carotid artery: Amaurosis fugax may present as a type of transient ischemic attack (TIA), during which an embolus unilaterally obstructs the lumen of the retinal artery or ophthalmic artery, causing a decrease in blood flow to the ipsilateral retina. The most common source of these athero-emboli is an atherosclerotic carotid ...

  5. Internal carotid artery - Wikipedia

    en.wikipedia.org/wiki/Internal_carotid_artery

    The ophthalmic segment, or C6, extends from the distal dural ring, which is continuous with the falx cerebri, to the origin of the posterior communicating artery. The ophthalmic segment courses roughly horizontally, parallel to the optic nerve, which runs superomedially to the carotid at this point. The named branches of the ophthalmic segment ...

  6. Supraorbital artery - Wikipedia

    en.wikipedia.org/wiki/Supraorbital_artery

    The supraorbital artery is a branch of the ophthalmic artery. It passes anteriorly within the orbit to exit the orbit through the supraorbital foramen or notch alongside the supraorbital nerve , splitting into two terminal branches which go on to form anastomoses with arteries of the head.

  7. Magnetic resonance angiography - Wikipedia

    en.wikipedia.org/wiki/Magnetic_resonance_angiography

    Magnetic resonance angiography (MRA) is a group of techniques based on magnetic resonance imaging (MRI) to image blood vessels. Magnetic resonance angiography is used to generate images of arteries (and less commonly veins) in order to evaluate them for stenosis (abnormal narrowing), occlusions, aneurysms (vessel wall dilatations, at risk of rupture) or other abnormalities.

  8. Cavernous sinus thrombosis - Wikipedia

    en.wikipedia.org/wiki/Cavernous_sinus_thrombosis

    An MRI using flow parameters and an MR venogram are more sensitive than a CT scan and are the imaging studies of choice to diagnose cavernous sinus thrombosis. Findings may include deformity of the internal carotid artery within the cavernous sinus, and an obvious signal hyperintensity within thrombosed vascular sinuses on all pulse sequences.

  9. Ocular ischemic syndrome - Wikipedia

    en.wikipedia.org/wiki/Ocular_ischemic_syndrome

    Ocular ischemic syndrome is the constellation of ocular signs and symptoms secondary to severe, chronic arterial hypoperfusion to the eye. [1] Amaurosis fugax is a form of acute vision loss caused by reduced blood flow to the eye; it may be a warning sign of an impending stroke, as both stroke and retinal artery occlusion can be caused by thromboembolism due to atherosclerosis elsewhere in the ...

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