تصوير صبغة الشبكية: إمتى نحتاجه وإيه اللي يوضحه؟

English version

Fluorescein Angiography: What the Retinal Dye Test Shows

Quick answer

Fluorescein angiography takes a sequence of retinal photographs after yellow dye is injected into a vein in the arm. It helps the ophthalmologist assess blood flow, leakage and abnormal vessels. Skin or urine may look yellow temporarily, and other reactions are possible; tell the team about allergies or prior reactions before the test.

What happens during the test?

After check-in and pupil-dilating drops, dye is injected into the arm and a series of retinal photographs is taken. Imaging usually takes several minutes, while dilation can affect vision for hours. Ask the clinic whether you need a companion or should avoid driving afterward.

Why might a retinal specialist order it?

It can help assess vessel leakage, abnormal new vessels or circulation changes, including in some cases of diabetic retinopathy or retinal vein occlusion. Not everyone needs this test; the ophthalmologist chooses it when the images can add useful information.

Angiography versus OCT

Angiography tracks dye moving through retinal vessels, while OCT creates cross-sectional images of retinal layers without an injection. The tests answer different questions, and an ophthalmologist may choose one or both.

Temporary effects and when to get help

Skin may look yellow for a few hours and urine orange or dark yellow for up to about a day; some people feel nausea or itchiness. A severe allergic reaction is rare but possible. Get immediate help for breathing difficulty or marked swelling, and report any concerning symptom.

Frequently asked questions

Is fluorescein angiography painful?

You may feel the needle or mild discomfort; experiences vary. Tell the team if you feel pain or dizzy.

Will my urine change color afterward?

It may look orange or dark yellow for up to about 24 hours as the dye leaves your body.

Does angiography replace OCT?

No. The tests show different information, and the ophthalmologist may choose one or both.

This article is for education and does not replace an eye examination. Sudden vision loss, severe pain or an eye injury needs urgent assessment.