Which diagnostic approach is used for a photographic study of the eye's blood vessels after administration of a dye?

Which diagnostic approach is used for a photographic study of the eye's blood vessels after administration of a dye?

• A. Fluorescein angiography (FA)
• B. Fluorescein staining
• C. Slit-lamp examination
• D. Tonometry

Answer: (A)

Imaging the eye’s blood vessels after giving a fluorescent dye is fluorescein angiography. By injecting a fluorescent dye into the bloodstream, the retinal and choroidal vessels light up as the dye flows through them. A camera captures a sequence of photographs under blue light, showing the arteries, capillaries, and veins, and any dye leakage or blockage. This helps assess blood flow and vessel health in conditions like diabetic retinopathy, retinal vein occlusion, or age-related macular degeneration. Fluorescein staining, in contrast, uses dye applied to the surface of the eye to reveal corneal epithelial defects. A slit-lamp exam is a thorough clinical look at eye structures, not a dye-based vascular study. Tonometry measures intraocular pressure, not retinal vasculature imaging.

Imaging the eye’s blood vessels after giving a fluorescent dye is fluorescein angiography. By injecting a fluorescent dye into the bloodstream, the retinal and choroidal vessels light up as the dye flows through them. A camera captures a sequence of photographs under blue light, showing the arteries, capillaries, and veins, and any dye leakage or blockage. This helps assess blood flow and vessel health in conditions like diabetic retinopathy, retinal vein occlusion, or age-related macular degeneration.

Fluorescein staining, in contrast, uses dye applied to the surface of the eye to reveal corneal epithelial defects. A slit-lamp exam is a thorough clinical look at eye structures, not a dye-based vascular study. Tonometry measures intraocular pressure, not retinal vasculature imaging.