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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 ?
Osmoprotectants commonly used in artificial tears are erythritol, glycerol, L-carnitin, and betaine (BAUDOUIN et al.
The most common non-pharmaceutical therapy for DED is occlusion of the lacrimal puncta or canaliculi; this slows tear clearance and is indicated in patients with ADDE only after frequent use of unpreserved artificial tears and lubricants remains insufficient.
46 dry eye cases were treated with artificial tears.
Mild cases of dry eyes can usually be managed with over-the-counter artificial tear solutions.
The mainstays of dry eye treatment are over-the-counter artificial tears in the form of eyedrops.
Artificial tears are the primary treatment for dry eyes.
Allowing a subsidy for OTC products such as artificial tears without a prescription may make it difficult to determine whether consumers are using health account money to buy personal care products, such as sun screen and cold remedies, Van de Water said.
People definitely felt better with this product than with artificial tears," said Dr.
Dry eyes respond to the use of artificial tears applied every one to four hours or to pharmacological stimulation of tear production.
An often-recommended brand of artificial tears is Refresh.
Artificial tears, sold over the counter (OTC), are the most widely used treatment for dry eye.