Blockade of Central Retinal Artery leads to temporary blindness is also known as:
Hmm, I think the term is amaurosis fugax. That's when there's a temporary loss of vision, usually due to an embolus or thrombus. It's often associated with carotid artery issues. But wait, the central retinal artery itself is involved here. So when it's blocked, maybe it's called central retinal artery occlusion (CRAO), but that's usually permanent unless treated. But the question says "blockade leads to temporary blindness," so maybe it's a transient episode, which would be amaurosis fugax.
Wait, no. Amaurosis fugax is more about the ophthalmic artery or retinal artery being temporarily blocked, causing transient vision loss. CRAO is when the artery is blocked and causes sudden, painless vision loss. But the key here is that the question mentions "blockade" leading to temporary blindness. So maybe the correct answer is amaurosis fugax. Let me double-check.
Another thought: central retinal artery occlusion is a medical emergency, but it's not temporary. Amaurosis fugax is transient, so that fits the term here. The options might include other terms like retinal artery occlusion, but the key is the temporary aspect. So the answer should be amaurosis fugax.
Let me confirm the definitions. Amaurosis fugax is a temporary loss of vision in one eye, typically due to an embolus or thrombus in the retinal artery. It's a precursor to stroke. Central retinal artery occlusion (CRAO) is when the artery is blocked and causes sudden, painless vision loss. So if the question is about temporary blindness due to blockade, the answer is amaurosis fugax.
So the correct answer is Amaurosis Fugax. Now, the options might have that as an option. Let's say the options are A. Amaurosis Fugax, B. CRAO, etc. The other options would be incorrect because they refer to permanent or different types of occlusions. The clinical pearl is that amaurosis fugax is a transient monocular vision loss and a warning sign of stroke. High-yield fact: it's often due to carotid artery disease.
Need to structure the explanation with the required sections. Core concept is the pathophysiology of temporary vision loss from retinal artery blockage. The correct answer is explained by the transient nature. The incorrect options are other occlusions or conditions. The clinical pearl is the importance of recognizing it as a stroke risk.
**Core Concept**
Central retinal artery occlusion (CRAO) causes sudden, painless vision loss due to ischemia of the retina. Transient monocular vision loss from embolic or thrombotic occlusion is termed **amaurosis fugax**, a classic sign of carotid artery disease or cardiac embolism.
**Why the Correct Answer is Right**
Amaurosis fugax results from temporary obstruction of the central retinal artery, often by microemboli from carotid plaques or cardiac sources. It is a transient, reversible condition lasting minutes to hours, distinguishing it from permanent CRA