Category: O

Inflammation of the optic nerve. If the inflammation affects the nerve where it connects with the back of the eye, it is called papillitis and the sole symptom is usually gradual or sudden blurred vision or blindness of the affected eye. If the inflammation affects the optic nerve outside the eye, it is called retrobulbar…

Lung disorders caused by repeated exposure to hazardous agents in the workplace that are inhaled into the lungs. These diseases include asbestosis, coal worker’s pneumoconiosis, silicosis, byssinosis, hypersensitivity pneumonitis, and occupational asthma. Illness of the lungs caused by exposure to hazardous agents that exist in the workplace. Occupational lung diseases are usually caused by contact…

A pathological process that involves narrowing of the bronchial airways. Obstructive airways disease may affect the windpipe (trachea), as well as its smaller branches (the bronchi), which are connected to the lungs and supply air to them.  

Also known as pickwickian syndrome; a group of symptoms that may accompany extreme obesity. Obesity-hypoventilation syndrome is characterized by shortness of breath, a flushed face, nighttime sleep disturbances such as sleep APNEA syndrome, and an irresistible urge to take short naps during the day. Because massive obesity interferes with breathing, people with this condition may…

A partial or complete blockage of the intestines that prevents the passage of the contents of the intestines. Obstruction of the intestine can be due to a number of causes. Symptoms vary according to where the blockage occurs and may include severe abdominal pain, cramping, and distension. Abdominal distension due to obstruction is a medical…

An acute viral infection caused by the herpes simplex virus type 1 and characterized by blisters in or around the mouth and lips. Orolabial herpes may or may not be related to genital herpes. Initially, the infection causes symptoms that include swelling, burning, or soreness in areas inside the mouth and on the outer skin…

Other methods of birth control include the rhythm method (natural family planning), spermicides, coitus interruptus (the withdrawal method), intrauterine devices (lUDs), and sterilization. Each method works in a different way to prevent pregnancy.  

A therapeutic device worn around the neck to provide support for the neck. An orthopedic collar may be made of rigid plastic for firm support during daily activities. During sleep, a softer, more comfortable, cotton collar may be worn. Orthopedic collars may be the first line of treatment for cervical osteoarthritis when there is persistent…

An appliance that supports a bone or joint structure and its associated muscles, tendons, and ligaments to aid in repair following injury or surgery or that is worn to promote proper positioning of the spine or the extremities. Orthopedic braces may be prescribed for the treatment of instability in the shoulder or knee and to…

Microscopic examination of feces for parasites such as worms or amoebae and their eggs (ova), to detect parasitic infection.