R R

What Is Fluorescein Staining?

Fluorescein staining is an eye test that uses a harmless orange dye to detect irregularities on the cornea and conjunctiva. When exposed to blue light, the dye glows green in areas where the eye's surface is damaged or dry. This helps doctors identify injuries, dryness, or foreign particles on the eye.

Link to This Resource Page

Provide a valuable resource to your clients or customers by linking to this resource page. Just place the following link on your website.

To display this...

What Is Fluorescein Staining?

Fluorescein staining is an eye test that uses a harmless orange dye to detect irregularities on the cornea and conjunctiva. When exposed to blue light, the dye glows green in areas where the eye's surface is damaged or dry. This helps doctors identify injuries, dryness, or foreign particles on the eye.

read more about fluorescein staining ...

Copy this HTML:

Copy HTML Copied!

How Fluorescein Staining Works?

A small amount of fluorescein dye is applied to the tear film, usually through drops or a moistened paper strip. The dye spreads across the eye's surface and collects in areas where the epithelial layer is broken or irritated. A blue light from a slit-lamp microscope makes these areas glow, allowing the doctor to locate and assess the extent of the damage.

What Fluorescein Staining Detects?

Fluorescein staining helps diagnose a range of eye issues.

  • Corneal abrasions - Scratches from contact lenses, debris, or trauma.
  • Dry eye disease - Uneven tear coverage or poor lubrication.
  • Contact lens irritation - Poor fit or overwear causes staining patterns.
  • Foreign bodies - Particles embedded in the cornea or conjunctiva.
  • Infections or ulcers - Bright, well-defined staining spots reveal affected areas.

What to Expect During the Test?

The test is quick, painless, and usually part of a routine eye exam. You might feel a mild cooling sensation when the dye is applied. Your doctor will shine a blue light across the eye while examining the cornea through a slit lamp. Results appear immediately, and the dye naturally rinses away with tears within minutes.

When Fluorescein Staining Is Used?

Fluorescein staining is common for patients with eye pain, redness, or vision changes. It is also used to monitor healing after surgery or injury. For contact lens users, it helps determine if lenses are fitting properly or causing dryness.

FAQs on Fluorescein Staining

Is fluorescein dye safe?

Yes, it is safe and non-toxic. The dye leaves the eye naturally within a few minutes.

Does fluorescein staining hurt?

No, the procedure is painless and causes only brief mild discomfort if at all.

Can I wear contacts after fluorescein staining?

You can wear them again once the eye is rinsed and your doctor confirms there is no irritation.

When to See Your Doctor

Fluorescein is used by doctors to find corneal scratches or dry eye patterns. If your eye remains yellow or feels gritty long after the test, or if you develop sudden redness after the drops, notify your practitioner to check for a rare sensitivity to the preservative in the dye.

References

College of Optometrists. Diagnostic Drugs (college-optometrists.org). 2024.

Review of Optometry. Staining Patterns in Dry Eye (reviewofoptometry.com). 2023.

MedlinePlus. Fluorescein Eye Stain (medlineplus.gov). 2024.

AAO. How Eye Doctors Use Diagnostic Dyes (aao.org). 2024.