Tears are clear liquid secreted by lacrimal glands in all land mammals. Tears consist of lipid, aqueous, and mucous layers. Lacrimal fluid flows through ducts into space between eyeball and lids
Meibomian glands are located along eyelid edges, secreting meibum for tear stability. Approximately 25-40 glands in upper eyelid and 20-30 in lower eyelid. Tear film consists of watery, oil, and mucus layers
Chondroitin is a biological polymer found in cartilage matrix. First extracted and purified in 1960. Bioavailability ranges from 0% to 13% when dissolved in water
Lacrimal gland is almond-shaped, located in upper outer corner of eye socket. Produces aqueous layer of tears containing water, mucus, and oil. Gland consists of orbital and palpebral lobes with accessory Krause and Wolfring glands. Tears drain through puncta in eyelids and spread across eye during blinking
Red eyes result from enlarged blood vessels on the white of the eye. Allergies to pollen, pet dander, dust, and mold can cause redness. Dry eye occurs when tears evaporate too quickly or eyes can't produce tears. Pinkeye is an infectious inflammation of the eyelid and eye lining. Broken blood vessels can appear suddenly from sneezing or heavy lifting
Contains 1% carboxymethylcellulose sodium as lubricant eye drop. Sterile ophthalmic solution for temporary relief of eye irritation. Protects eyes from further irritation and relieves dryness