What is a common effect of Amaurosis Fugax related to an internal carotid lesion?

Amaurosis fugax refers to a temporary loss of vision, often described as a curtain falling over the eye or a transient blackout. This phenomenon is typically linked to issues with the vascular supply to the eye. When there is an internal carotid artery lesion, such as a stenosis or plaque, it can lead to transient ischemia affecting the blood flow to the retina, specifically on the side of the lesion.

The reason temporary blindness is noted in the ipsilateral eye is due to the direct relationship between the internal carotid artery and the retinal arteries it supplies. If blood flow is compromised because of a lesion in the internal carotid artery, the area affected would be the retina supplied by these compromised vessels, leading to transient visual symptoms in the corresponding eye.

In contrast, conditions such as permanent blindness or visual distortion in both eyes indicate more severe and widespread damage or systemic issues that are not characteristic of amaurosis fugax, which is distinctly a temporary issue linked to a localized vascular problem. Similarly, loss of peripheral vision would suggest different underlying conditions that wouldn't typically correlate with the immediate effects of an internal carotid lesion.