Blocked Tear Ducts: Dye Disappearance Test - Topic Overview
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.
Primary congenital glaucoma (PCG) is an eye disease that affects children between the ages of birth and 3 years. It is one type of glaucoma. Glaucoma refers to a group of diseases that affect the eye and cause major damage to the optic nerve.
Primary congenital glaucoma is rare. It affects about one in every 10,000 infants. But it is serious and needs attention. Untreated primary congenital glaucoma is a major cause of childhood blindness.
"Primary" means the disease does not result from another...