Corneal ulcer facts With prompt treatment, most corneal ulcers improve with minimal adverse effect on vision. A corneal ulcer is an open sore of the cornea. There are a wide variety of causes of corneal ulcers, including infection, physical and chemical trauma, corneal drying and exposure, and contact lens overwear and misuse. Corneal ulcers are...
What is bimatoprost, and how does it work (mechanism of action)? Bimatoprost is a synthetic (man-made) drug that resembles and mimics the effects of natural chemicals (prostaglandins) produced by the body and is used for reducing intraocular pressure (IOP) and increasing the growth of eyelashes. The exact mechanism of action is unknown. Bimatoprost may reduce...
Subconjunctival hemorrhage facts A red patch on the white of the eye is a sign of a subconjunctival hemorrhage. The conjunctiva is the thin tissue that covers the sclera. It is the outermost protective coating of the eyeball. The wall of a small blood vessel within the conjunctiva may break spontaneously or from injury, causing...
Black eye facts Picture of the anatomy of the eye A black eye often results from injury to the face or the head, and is caused when blood and other fluids collect in the space around the eye. Swelling and dark discoloration result in a "black eye." Most black eyes are relatively minor injuries. Many...
What is betaxolol ophthalmic, and how does it work (mechanism of action)? Betaxolol is a beta-adrenergic blocking agent that is used for the treatment of glaucoma. When taken by mouth, betaxolol and other beta-adrenergic blocking agents act mainly by blocking the action of the sympathetic (adrenergic) nervous system, for example, on the heart. In addition...
What is dorzolamide, and how does it work (mechanism of action)? Dorzolamide is an ophthalmic solution (a liquid that is placed in the eyes) that is used for treating glaucoma. It is in a class of drugs called carbonic anhydrase inhibitors which also includes brinzolamide (Azopt). Many parts of the body, including the eye, contain...
What is tetracaine ophthalmic drops, and how does it work (mechanism of action)? Tetracaine is a topical local anesthetic for the eyes. Tetracaine works by interfering with entry of sodium ions into nerve cells. This reduces the ability of nerves to generate an impulse and send pain sensations. What brand names are available for tetracaine...
Trachoma facts Trachoma is the leading infectious cause of blindness in the world. Trachoma is a contagious and potentially blinding infectious eye disease. The World Health Organization classified trachoma as one of the neglected tropical diseases and the leading infectious cause of blindness in the world. Blindness from trachoma may be preventable by screening and...
What is polymyxin b/trimethoprim-ophthalmic, and how does it work (mechanism of action)? Polymyxin B sulfate/trimethoprim is an antibiotic eye drop composed of two drugs. Polymyxin B sulfate works by altering bacterial cell wall structure that causes the leaking out of cellular contents that can result in cell death. Trimethoprim is an antibiotic that interferes with...
What is antipyrine and benzocaine otic (Auralgan, Aurodex – discontinued)? Antipyrine/benzocaine is a combination product used for cleaning the ear canal and for treating middle ear infections. It reduces pressure, congestion, inflammation, pain, and discomfort in the ear. What brand names are available for antipyrine and benzocaine otic (Auralgan, Aurodex – discontinued)? On July, 2,...