Certified Ophthalmic Technician (COT) Practice Test 2025 - Free COT Practice Questions and Study Guide

Question: 1 / 400

What is typically observed during the arterial phase of fluorescein angiography?

Choroidal staining

Dye filling the arteries

During the arterial phase of fluorescein angiography, the primary observation is the filling of the retinal and choroidal arteries with the fluorescein dye. This phase occurs shortly after the dye is injected and indicates the normal function and perfusion of the blood vessels in the eye. The clear visualization of the arteries shows how the dye travels through the blood vessels, providing important information about the vascular structure and any potential abnormalities.

In contrast, choroidal staining and capillary leakage are typically observed in later phases of the angiography. Increased retinal blood flow is a response that may occur due to pathological conditions, but during the arterial phase, the emphasis is specifically on the filling of the arteries rather than changes in flow dynamics. Understanding these phases helps in diagnosing various retinal conditions and analyzing blood flow issues effectively.

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Capillary leakage

Increased retinal blood flow

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