Which type of TIA would most likely cause Ipsilateral Amaurosis Fugax?

Ipsilateral amaurosis fugax is a transient loss of vision in one eye, often described as a "shade" or "curtain" coming down over the eye. It is typically linked to occlusion or ischemia of the retinal artery, commonly associated with carotid artery disease.

In the case of a carotid artery TIA, there is often compromised blood flow due to embolic events originating from the carotid artery, which supplies blood to the eye via the ophthalmic artery. When a transient ischemic attack occurs as a result of embolism from the carotid system, the retina can become temporarily ischemic, leading to amaurosis fugax.

By contrast, vertebrobasilar TIAs mainly affect the posterior circulation of the brain, which involves different vascular territories and typically does not lead to amaurosis fugax. Aortic dissection can also cause ischemia, but usually affects organs more distally rather than directly impacting the carotid arteries and their branches. Global brain ischemia can result in a variety of neurological symptoms, but it is not typically associated with localized symptoms such as amaurosis fugax, which is specifically tied to the carotid artery's impact on the eye.

Thus, the connection