Fluorescein is a dye that is used in a variety of medical and scientific applications. For example, it is often used as a diagnostic tool to help identify and treat eye conditions and visualize blood flow in the body.

In the eye, fluorescein detects and diagnoses conditions such as corneal abrasions, dry eye syndrome, and retinal detachment. It is administered as a drop or injection and then observed under a special light called a slit lamp. The dye glows when it comes into contact with specific tissues in the eye, which aids in diagnosing abnormalities.

Fluorescein is also used in angiography, a medical imaging technique that uses dye to visualize blood vessels in the body. For example, I have administered it intravenously while my surgical colleagues shine a Wood’s lamp into the surgical field looking for areas of malperfusion in the bowel.

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