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Freckles are clusters of concentrated melaninized cells which are most easily visible on people with a fair complexion. Freckles do not have an increased number of the melanin-producing cells, or melanocytes , but instead have melanocytes that overproduce melanin granules ( melanosomes ) changing the coloration of the outer skin cells ...
This is an accepted version of this page This is the latest accepted revision, reviewed on 2 March 2025. "Skin pigmentation" redirects here. For animal skin pigmentation, see Biological pigment. Extended Coloured family from South Africa showing some spectrum of human skin coloration Human skin color ranges from the darkest brown to the lightest hues. Differences in skin color among ...
Melanin in the eyes, in the iris and choroid, helps protect from ultraviolet and high-frequency visible light; people with blue, green, and grey eyes are more at risk of sun-related eye problems. Furthermore, the ocular lens yellows with age, providing added protection.
Most often, what you’re seeing is either the reemergence of freckles or a new sun spot. Allow our experts to explain the difference ahead. Meet the Experts What’s the Difference Between ...
Melanocytes from light skin cells cocultured with keratinocytes give rise to a distribution pattern characteristic of light skin. [93] Freckles usually only occur in people with very lightly pigmented skin. They vary from very dark to brown in colour and develop a random pattern on the skin of the individual. [94]
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The mom of two, from Georgia, simply chalked them up to being in the sun. "Honestly, I thought they were sun spots. I thought they were going to say, 'just your skin aging.
Xeroderma pigmentosum (XP) is a genetic disorder in which there is a decreased ability to repair DNA damage such as that caused by ultraviolet (UV) light. [1] Symptoms may include a severe sunburn after only a few minutes in the sun, freckling in sun-exposed areas, dry skin and changes in skin pigmentation. [1]