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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 the ...
Decisional balance sheet. A decisional balance sheet or decision balance sheet is a tabular method for representing the pros and cons of different choices and for helping someone decide what to do in a certain circumstance. It is often used in working with ambivalence in people who are engaged in behaviours that are harmful to their health (for ...
Hazel eyes mostly occur in individuals whose ancestry is from North Africa, the Middle East, Brazil and Spain—although, anyone can have this genetic mutation. View the original article to see ...
Out of the conventional eye colors we'd think of—brown, blue, hazel and green—green is the rarest of the four. Only about two percent of the world's population has naturally green eyes.
The human eye is a sensory organ in the visual system that reacts to visible light allowing eyesight. Other functions include maintaining the circadian rhythm, and keeping balance. Arizona Eye Model. "A" is accommodation in diopters. The eye can be considered as a living optical device. It is approximately spherical in shape, with its outer ...
A photoreceptor cell is a specialized type of neuroepithelial cell found in the retina that is capable of visual phototransduction. The great biological importance of photoreceptors is that they convert light (visible electromagnetic radiation) into signals that can stimulate biological processes. To be more specific, photoreceptor proteins in ...
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An adult woman with medium or dark brown hair, with brown, blue, or hazel eyes. Usually a businesswoman or social butterfly. An adult woman with dark brown to black hair, and dark brown eyes. Usually a widow or divorced woman, or a woman from a foreign country. Ambitious and intelligent, can be cold, calculating, or spiteful.