Field, visual

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Field, visual

Field, visual

The entire area that can be seen when the eye is directed forward, including that which is seen with peripheral vision.

RELATED TERMS
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Peripheral
At or near the surface of the body. Located away from the center structure.

Vision
The sense of sight.

SIMILAR TERMS
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PREVIOUS AND NEXT TERMS
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Fibrosis, radiation
Scarring of the lungs from radiation. Radiation fibrosis is a sequel of radiation pneumonitis (inflammation of the lungs due to radiation), as from radiation therapy. Radiation pneumonitis typically occurs after radiation treatments for cancer within the chest or breast and usually manifests itself 2 weeks to 6 months after completion of radiation therapy. Symptoms include shortness of breath upon activity, cough and fever. Radiation pneumonitis frequently is discovered as an incidental finding on chest x-ray in patients who have no symptoms.

Fibrous dysplasia, monostotic
Excessive growth of hard fibrous tissue that replaces normal bone tissue in a single bone. Symptoms may include pain and fracture of the bone. Most cases are diagnosed in adolescence and young adulthood and remain unchanged throughout life. The prognosis (outlook) is usually very good.

Fibrous dysplasia, polyostotic
A genetic disorder of bones, skin pigmentation and hormonal problems with premature sexual development. Also called McCune-Albright syndrome or the Albright syndrome. In the syndrome, there is bone disease with fractures and deformity of the legs, arms and skull; pigment patches of the skin; and endocrine (hormonal) disease with early puberty (early menstrual bleeding, development of breasts and pubic hair) and an increased rate of growth. Polyostotic fibrous dysplasia is usually caused by mosaicism for a mutation in a gene called GNAS1 (Guanine Nucleotide binding protein, Alpha Stimulating activity polypeptide 1).

Fibulin 3
A protein that belongs to a family of extracellular proteins expressed in the basement membranes of blood vessels. The gene that encodes fibulin 3 is FBLN3 (or EFEMP1). FBLN3 is located on chromosome 2 in band 2p16. A single mutation in FBLN3 is responsible for an autosomal dominant form of macular degeneration.

Fibulin 5
A protein that belongs to a family of extracellular proteins expressed in the basement membranes of blood vessels. Fibulin 5 may be essential for the polymerization of elastin. Missense mutations in FBLN5, the gene that encodes fibulin 5, appear responsible for 1-2% of cases of age-related macular degeneration (AMD). FBLN5 is located on chromosome 14 in band 14q32.1.

Field, visual

Fifth cranial nerve
The fifth cranial nerve is the trigeminal nerve. The trigeminal nerve is quite complex. It functions both as the chief nerve of sensation for the face and the motor nerve controlling the muscles of mastication (chewing). Problems with the sensory part of the trigeminal nerve result in pain or loss of sensation in the face. Problems with the motor root of the trigeminal nerve result in deviation of the jaw toward the affected side and trouble chewing. The cranial nerves, the trigeminal nerve included, emerge from or enter the skull (the cranium), as opposed to the spinal nerves which emerge from the vertebral column. There are twelve cranial nerves.

Filial
1. In genetics, the first generation that results from the crossing of two parental lines, as the filial generation. 2. In general, pertaining to the relationship of children, both sons and daughters, to their parents.

Filler
An inactive substance used to make a product bigger or easier to handle. For example, fillers are often used to make pills or capsules because the amount of active drug is too small to be handled conveniently.

Film
Slang shortening of X-ray film, an X-ray, a radiograph.

Film, AP
An X-ray picture in which the beams pass from front-to-back (anteroposterior). As opposed to a PA (posteroanterior) film in which the rays pass through the body from back-to-front.

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This dictionary contains 25007 terms.

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