Achromatopsia Characterized by a lack of color vision with poor visual acuity, nystagmus, and sensitivity to sunlight. No treatment is available except, for example, sunglasses for the sensitivity to light.
The sense of sight.
The highest spatial frequency rsolvable with a grating of unity contrast (i.e. the maximum possibly contrast).
Nystagmus is a rhythmic, repetitive, oscillatory eye movement. It may occur as a result of vestibular problems, as a result of visual problems, or as a result of certain brain stem or cerebellar abnormalities. Vestibular Nystagmus is characterized by a slow migration of the eyes in the wrong direction, followed by a sudden jerking back response.
1. The reciprocal of the minimum stimulus strength required for the stimulus to be detected reliably (1/threshold) May be related to noise and other mechanisms.
2. Physiologically measured sensitivity averaged over many stimulus/response cycles. A measure of gain. Noise free.
A large group of aerobic bacteria which show up as pink (negative) when treated by the gram-staining method.
A genus of gram-negative, aerobic, motile bacteria that occur in water and soil. Some are common inhabitants of the intestinal tract of vertebrates. These bacteria occasionally cause opportunistic infections in humans.
Achromycin v is a prescription or over-the-counter drug which is (or once was) legal in the United States and possibly in other countries. Active ingredient(s): tetracycline hydrochloride.
An antibiotic originally produced by Streptomyces viridifaciens, but used mostly in synthetic form. It is an inhibitor of aminoacyl-tRNA binding during protein synthesis.
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A periferal vasodilator made by Novartis and based on hydralazine.
A medicine produced by Novartis and providing up to two hours of longer-lasting hypotonic relief.
In younger people, under age 40, the lens is adjusted by the ciliary muscles to focus clearly for near as well as far vision. With age the lens is less able to change, eventually requiring reading glasses or bifocals for close work.
Age Related Macular Degeneration
A hereditary condition in which darker pigment fails to form in the eye, hair and skin. In ocular albinism, visual acuity ranges from 20/40 to 20/200 (legal blindness), the eyes may dance (nystagmus) and the person is very sensitive to sunlight. No treatment is available, except dark sunglasses for the photophobia.
A hereditary eye problem in which the iris, the colored part of the eye, is absent. There is poor vision, sensitivity to sunlight, nystagmus, and a tendency to develop glaucoma.
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