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Trachoma
Trachoma A viral infection of the cornea and conjunctiva which may produce scarring and impaired vision.
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Infection
Anything that invades the body and reproduces. Infections can be bacteria, protozoa, fungi, or viruses. Bacteria and fungi are one celled creatures that cause many infections including strep throat, bladder infections, and some lung infections. Fungi cause “athlete’s foot” and thrush, an infection in the mouth. Protozoa are small organisms with many cells that can cause infections in the guts or in the lungs. Most healthy people do not get protozoal infections, but people with suppressed immune systems can. Viruses are not really organisms; they are tiny particles that can live only inside another cell. They reproduce by taking over a cell and causing that cell to make more virus particles, rather than doing what the cell is supposed to do. Viruses cause most colds and flu cases.
Cornea
The front part of the eye that acts as a window for the entrance of light rays. It is attached to the other outer coat of the eye, the sclera; the white part of the eye. The cornea provides a significant amount of focusing power for the eye (the rest is provided by the lens). Because it has many nerve fibers, an injury or foreign body causes significant pain and discomfort.
Conjunctiva
The membrane lining the eyelids and covering the eyeball.
Vision
The sense of sight.
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Trachea
The trachea is a tube which extends from the larynx to the esophagus. It is connected to the trachea at about the area where the larynx is located. It functions as a tube for air to pass through from the external environment to the lungs. It is composed of C-shaped cartilage rings which are embedded in the smooth muscle. The cartilage prevents the trachea from collapsing and closing off the airway.
Tracheitis
Inflammation of the lining membrane of the trachea.
Tracheoesophageal fistula (TEF)
A condition that occurs when there is a gap between the upper and lower segments of the esophagus, and food and saliva cannot pass through.
Tracheostomy
A surgical incision in the trachea (the windpipe) through which a rigid tube is inserted to allow air to enter.
Tracleer
Tracleer is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): bosentan.
Tracrium
Tracrium is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): atracurium besylate.
Tracrium preservative free
Tracrium preservative free is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): atracurium besylate.
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Timiperone
An antipsychotic medication.
Tetanus
An acute, life-threatening illness caused by a toxin (tetanospasmin) produced in infected wounds by the bacillus Clostridium tetani. The disease is marked by extreme muscular rigidity, violent muscle spasms, and often, respiratory and autonomic failure.
Tear duct
Part of the drainage system for the tears. The dilated part of the tear duct is called the lacrimal sac. An obstruction along the tear duct in infancy will cause a watery or draining eye. A warm compress is sometimes used to open a blocked tear duct. A tear duct probing surgery may be necessary to relieve the blockage.
Tonometer
An instrument used to measure the pressure within the eye. This is one of several factors used in diagnosis of glaucoma. The results may also be used to follow the response of treatment to this disease.
Trichiasis
The inward turning of an eyelash. If it scratches the cornea, there is discomfort similar to a foreign body sensation.
Trachoma
Testicular cancer
Tumors or cancer of the testis. Germ cell tumors (germinoma) of the testis constitute 95% of all testicular neoplasms.
Thrush
Infection of the mucous membranes of the mouth by a fungus of the genus candida.
Tinnitus
Sounds that are perceived in the absence of any external noise source which may take the form of buzzing, ringing, clicking, pulsations, and other noises. Objective tinnitus refers to noises generated from within the ear or adjacent structures that can be heard by other individuals. The term subjective tinnitus is used when the sound is audible only to the affected individual. Tinnitus may occur as a manifestation of cochlear diseases; vestibulocochlear nerve diseases; intracranial hypertension; craniocerebral trauma; and other conditions.
Trichomonas
A genus of parasitic flagellate protozoans distinguished by the presence of four anterior flagella, an undulating membrane, and a trailing flagellum.
Tuberculosis
Any of the infectious diseases of man and other animals caused by species of mycobacterium.
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