Tonometry is a method for measuring intraocular pressure (IOP) and detecting glaucoma. Learn how tonometry is performed and the equipment that's used during the procedure.

Learn the definition of glaucoma, and get the facts on glaucoma tests, eye drops, surgery, symptoms, prevention, causes, and treatment. Glaucoma is the primary cause of irreversible blindness worldwide.

Sleep apnea is the cessation of breathing during sleep. Learn about sleep apnea, including a description of types of sleep apnea, symptoms, treatment (surgical and nonsurgical), causes, complications, diagnosis, evaluation, and importance of treatment.

Periodic paralysis syndrome describes seven to eight different types of rare genetic conditions that cause symptoms of episodic muscle weakness and paralysis. Episodes of paralysis can occur in only certain areas of the body, like an arm or leg, or the whole body. Hypokalemic and normokalemic are two kinds of this genetic problem. Treatment depends upon the type. There is no cure for these syndromes.

Get a list of over-the-counter medications used to treat asthma. Learn about asthma symptoms, and get information about medications containing ephedrine and other active ingredients to treat mild asthma symptoms.

Learn about seizure medications, their side effects, a list of common antiseizure medications and their uses.