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Prolonged exposure is associated with the development of skin cancers, photoaging or premature skin aging, immune suppression, and eye diseases like cataracts. [14] [15] Given these dual effects, public health organizations emphasize the importance of striking a balance between the benefits and risks of UV exposure.
However, in more recent literature many researchers have considered 30 ng/mL to be an insufficient concentration of vitamin D. [6] Subnormal levels of vitamin D are usually caused by poor nutrition or a lack of sun exposure. [5] Risk factors for hypovitaminosis D include premature birth, darker skin pigmentation, obesity, malabsorption, and ...
Decreased exposure of the skin to sunlight is a common cause of vitamin D deficiency. [1] People with a darker skin pigment with increased amounts of melanin may have decreased production of vitamin D. [3] Melanin absorbs ultraviolet B radiation from the sun and reduces vitamin D production. [3] Sunscreen can also reduce vitamin D production. [3]
When evaluating ultraviolet germicidal lights, eye and skin health are primary concerns. UV-B, predominantly responsible for the harmful effects of sunlight, poses the highest risk for erythema, photokeratitis, sunburn and skin cancer. [16] [17] [18] While longer UV-C wavelengths and UV-A can also cause damage, their effects are less severe ...
In the 1850s, Florence Nightingale's advocacy of exposure to clean air and sunlight for health restoration also contributed to the initial development of light therapy for treatments. [4] Later, Downes and Blunt's experiment in 1877 suggested sunlight's effect on fungal growth inhibition, which further evidenced the efficiency of light therapy ...
Long-term sunlight exposure is known to be associated with the development of skin cancer, skin aging, immune suppression, and eye diseases such as cataracts and macular degeneration. [54] Short-term overexposure is the cause of sunburn, snow blindness, and solar retinopathy.
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Light therapy, also called phototherapy or bright light therapy is the exposure to direct sunlight or artificial light at controlled wavelengths in order to treat a variety of medical disorders, including seasonal affective disorder (SAD), circadian rhythm sleep-wake disorders, cancers, and skin wound infections.