The main objective of carrying out the Dacryocysorhinostomy (DCR) Surgery is to relieve the sticky, watery eye which is caused by tear ducts (nasolacrimal duct) blockage that is between the lacrimal sac or tear sac that is at the extreme corner and the outflow gap or passage of the tear into the back of the nose.
Causes Of blocked tear duct
Causes of blocked tear ducts in children include:
· Failure of the thin tissue at the end of the tear duct to open normally. This is the most common cause.
· Blockage of the tear duct at both ends (dacryocystocele).
· Abnormal growth of the nasal bone that puts pressure on a tear duct and closes it off.
· Closed or undeveloped openings in the corners of the eyes where tears drain into the tear ducts.
Blocked tear ducts may run in families. In adults, blocked tear ducts may be caused by an injury to the bones or tissues around the eyes or by another disorder, sometimes related to aging. For example, a blocked tear duct may result from a thickening of the tear duct lining, abnormal tissue or structures in the nose, or problems from surgery on or around the nose.
Symptoms Of blocked tear duct
Symptoms often affect only one eye. They may include:
· Heavy tearing. This may range from the eye looking wet to having tears run down the cheek.
· A yellow or white buildup in the corner of the eye. The eyelids may stick together.
· Redness and swelling around the eye or nose. This can be caused by infection in the eye's drainage system, such as dacryocystitis. In severe cases, infection can spread to the eyelids. A severe infection can cause fever, pain, increased redness and swelling, and mucus or pus in the eye.
Babies who have blocked tear ducts usually have symptoms within the first few days to the first few weeks after birth.
The symptoms of a blocked tear duct may get worse after an upper respiratory infection, such as a cold or sinus infection. Wind, cold, and sunlight also may make symptoms worse.
How is a blocked tear duct diagnosed?
A blocked tear duct is diagnosed based on a medical history and a physical exam. The doctor may also use tests to measure the amount of tears or to see if tears are draining normally from the eyes. Other tests can help your doctor find out where the blockage is or how it was caused.