pterygium

pterygium A wing-like triangular membrane. Although a pterygium can be anywhere, including behind the knee, it commonly refers to a winglet of the conjunctiva. This pterygium may extend across the white of the eye, toward the inner corner of the eye. It is caused by prolonged exposure of the eyes to wind and weather, or…

psychotherapy

psychotherapy The treatment of a behavior disorder, mental illness, or any other condition by psychological means. Psychotherapy may utilize insight, persuasion, suggestion, reassurance, and instruction so that patients may see themselves and their problems more realistically and have the desire to cope effectively with them. There are many different types of psychotherapy, including cognitive therapy,…

psychosis

psychosis A thought disorder in which perception of reality is grossly impaired. Symptoms can include seeing, hearing, smelling, or tasting things that are not there; paranoia; and delusional thoughts. Depending on the condition underlying the psychotic symptoms, symptoms may be constant or they may come and go. Psychosis can occur as a result of brain…

psychologist

psychologist A professional who specializes in the diagnosis and treatment of diseases of the brain, emotional disturbance, and behavior problems. Psychologists use talk therapy as treatment; a person must see a psychiatrist or another medical doctor to be treated with medication. A psychologist may have a master’s degree (MA) or doctorate (PhD) in psychology. Psychologists…