Certified Ophthalmic Medical Technologist (COMT) Practice Exam

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What is the significance of initial blood presence during a fluorescein angiography?

  1. Indicates normal circulation

  2. Acts as a barrier to fluorescence

  3. Enhances fluorescence

  4. Causes immediate analysis

The correct answer is: Acts as a barrier to fluorescence

The presence of blood during fluorescein angiography is significant because it acts as a barrier to the fluorescence of the dye being injected into the bloodstream. Fluorescein, which is a fluorescent dye, emits light when illuminated with a specific wavelength. When there is blood present, it can attenuate the fluorescence of the dye due to absorption and scattering properties of the red blood cells. This results in variations in the intensity and quality of the images captured during the angiography procedure. Understanding this aspect is crucial for interpreting the angiographic results accurately, as the degree of fluorescence can affect diagnostic outcomes and provide insights into various ocular conditions.

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