Search results
Results from the WOW.Com Content Network
Eye color is a polygenic phenotypic trait determined by two factors: the pigmentation of the eye 's iris [ 1][ 2] and the frequency-dependence of the scattering of light by the turbid medium in the stroma of the iris. [ 3]: 9. In humans, the pigmentation of the iris varies from light brown to black, depending on the concentration of melanin in ...
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.
Atropa belladonna, commonly known as belladonna or deadly nightshade, is a toxic perennial herbaceous plant in the nightshade family Solanaceae, [ 1] which also includes tomatoes, potatoes and aubergine (eggplant). It is native to Europe and Western Asia, including Turkey. Its distribution extends from Ireland in the west to western Ukraine and ...
Carotenosis is a benign and reversible medical condition where an excess of dietary carotenoids results in orange discoloration of the outermost skin layer. The discoloration is most easily observed in light-skinned people and may be mistaken for jaundice. [ 1][ 2]: 540 [ 3]: 681 Carotenoids are lipid-soluble compounds that include alpha- and ...
Specialty. Dermatology. Albinism is a congenital condition characterized in humans by the partial or complete absence of pigment in the skin, hair and eyes. Albinism is associated with a number of vision defects, such as photophobia, nystagmus, and amblyopia. Lack of skin pigmentation makes for more susceptibility to sunburn and skin cancers.
Retinal regeneration refers to the restoration of vision in vertebrates that have suffered retinal lesions or retinal degeneration. The two most well-studied mechanisms of retinal regeneration are cell-mediated regeneration and cellular transplantation. Regenerative processes may have applications in humans for treating degenerative retinal ...
Jaundice, also known as icterus, is a yellowish or greenish pigmentation of the skin and sclera due to high bilirubin levels. [ 3][ 6] Jaundice in adults is typically a sign indicating the presence of underlying diseases involving abnormal heme metabolism, liver dysfunction, or biliary-tract obstruction. [ 7]
Specialty. Ophthalmology. Coats' disease is a rare congenital, nonhereditary eye disorder, causing full or partial blindness, characterized by abnormal development of blood vessels behind the retina. Coats' disease can also fall under glaucoma. It can have a similar presentation to that of retinoblastoma.