A fluorescein dye disappearance test is used in children
and adults to find out whether
tears are draining normally from the eyes into the
One drop of a special dye (fluorescein) or a
paper strip containing the dye is placed between the eyelid and the
After 10 to 15 minutes, the doctor looks in your eye using a
blue light. The light can detect very small amounts of fluorescent dye. The
doctor may also use the light to look in your throat and inside your
Normally, tears sweep the dye out of the eye and into the
tear ducts. If dye stays in the eye, the tear duct may be blocked.
You may have heard about recent research suggesting that certain nutrients can help delay or prevent eye problems and disease. You may also have heard a lot of claims for over-the-counter (OTC) visionsupplements containing these nutrients -- and claims for others that have not been tested in clinical studies.
So what should you believe? What can you do to protect your eye health and eyesight using vision supplements? Here is information to help you decide.
Important: Your doctor is your first...
Both eyes are usually tested and compared during this test, which is done
after other exams have not clearly shown that the duct is blocked.
A baby may fuss and cry during this test. Parents are often asked to hold
and soothe their child while he or she is being tested.
In this article
This information is produced and provided by the National
Institute (NCI). The information in this topic may have changed since it was written. For the most current information, contact the National
Institute via the Internet web site at http://
.gov or call 1-800-4-CANCER.
WebMD Medical Reference from Healthwise
October 09, 2013
This information is not intended to replace the advice of a doctor.
Healthwise disclaims any liability for the decisions you make based on this