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a drop of the secretion of the lacrimal glands



a drop of the clear, slightly opalescent fluid secreted by the lacrimal glands. Tears are slightly alkaline. They contain as much as 99 percent water and 0.9 percent inorganic matter, chiefly sodium chloride and small quantities of sodium carbonate, magnesium carbonate, calcium sulfate, and calcium phosphate, as well as the antibacterial enzyme lysozyme; other proteins constitute 0.1 percent. Tears moisten the anterior surface of the eye and prevent it from drying, wash foreign bodies out of the conjunctival sac, and participate in the nutrition of the cornea.


run, 3
1. In roofing, the horizontal distance from the face of a wall to the ridge of the roof.
2. In stairways, the width of a single stair tread.
3. The horizontal distance covered by a flight of steps.
4. The runway or track for a sash.
5. A small stream of paint flowing vertically on a
References in periodicals archive ?
A primary approach to managing dry eyes is to utilize artificial tear solutions.
Artificial tears are the primary treatment for dry eyes.
First-line symptomatic therapy is always artificial tears.
Sally Barnes, Manhattan Beach, California, suggests a simple blood test for Sjogren's Syndrome, an autoimmune disease that attacks moisture-producing glands and is treated with artificial tears and medicines to quell inflammation and an overactive immune system.
It is closely related to rheumatoid arthritis and is treated in much the same way with the addition of artificial tears and skin moisturisers.
A Dry eye syndrome can be treated with artificial tears or eye lubricant ointments.
Treatments can include artificial tears, punctal plugs, special sunglasses and other prescriptions to alleviate the problem.
And artificial tears can help reduce eye irritation, lubricating the eyes to help you work longer.
Dry eyes respond to the use of artificial tears applied every one to four hours or to pharmacological stimulation of tear production.
The mainstays of dry eye treatment are over-the-counter artificial tears in the form of eye drops.
After swimming, have your parents help you rinse your eyes with a sterile eyewash or an artificial tears solution.
During the summer, dry eyes are very common so ask your pharmacist for artificial tears to lubricate them as this may be all that is needed.