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creosote bush, gobernadora, larreastat [ 4] Larrea tridentata, Larrea divaricata[ 4] Liver damage, [ 3][ 4][ 5] kidney problems, [ 4] Hypotension in cancer patients [ 3] Chinese herbal mixtures. Heavy metal poisoning [ 5] Coltsfoot. coughwort, farfarae folium leaf, foalswort [ 4] Tussilago farfara.
Vitamin A status involves eye health via two separate functions. Retinal is an essential factor in rod cells and cone cells in the retina responding to light exposure by sending nerve signals to the brain. An early sign of vitamin A deficiency is night blindness. [6]
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Optic neuropathy is damage to the optic nerve from any cause. The optic nerve is a bundle of millions of fibers in the retina that sends visual signals to the brain. Damage and death of these nerve cells, or neurons, leads to characteristic features of optic neuropathy. The main symptom is loss of vision, with colors appearing subtly washed out ...
Vitamin A deficiency ( VAD) or hypovitaminosis A is a lack of vitamin A in blood and tissues. [ 1] It is common in poorer countries, especially among children and women of reproductive age, but is rarely seen in more developed countries. [ 1] Nyctalopia (night blindness) is one of the first signs of VAD, as the vitamin has a major role in ...
Achromatopsia. Achromatopsia, also known as Rod monochromacy, is a medical syndrome that exhibits symptoms relating to five conditions, most notably monochromacy. Historically, the name referred to monochromacy in general, but now typically refers only to an autosomal recessive congenital color vision condition.
Major symptoms are sudden loss of vision (partial or complete), sudden blurred or "foggy" vision, and; pain on movement of the affected eye. [4] [5] [2]Many patients with optic neuritis may lose some of their color vision in the affected eye (especially red), with colors appearing subtly washed out compared to the other eye.
It occurs in humans and certain breeds of domesticated animals. Heterochromia of the eye is called heterochromia iridum or heterochromia iridis. It can be complete, sectoral, or central. In complete heterochromia, one iris is a different color from the other. In sectoral heterochromia, part of one iris is a different color from its remainder.