The entire area that can be seen when the eye is directed forward, including that which is seen with peripheral vision.
The visual field can be tested to measure the extent and distribution of the field of vision. The test may be done by a number of methods including what are termed confrontation, tangent screen exam and automated perimetry. Many diseases can adversely affect the visual field including glaucoma, strokes, high blood pressure (hypertension), diabetes, multiple sclerosis, overactivity of the thyroid gland (hyperthyroidism). Medications can also affect the visual field, some of which include the antimalarial medicines chloroquine (ATABRINE) and hydroxychloroquine (PLAQUENIL).
- Visual field test
Plaquenil), can also affect the visual field.
- Visual nerve pathways
The optic nerves serving the eyes join behind the eyes just in front of the pituitary gland to form a cross-shaped structure called the optic chiasma. Within the optic chiasma some of the nerve fibers cross. The fibers from the nasal (inside) half of each retina cross over, but those from the temporal (outside) sides […]
- Visual pathway glioma
A slow-growing benign tumor of the eye.
- Visual receptor
The layer of rods and cones that are the visual cells of the retina.
Necessary to maintain life. For example, breathing is a vital function.