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Light sensitivity or photosensitivity refers to a notable or increased reactivity to light. Apart from vision , human beings have many physiological and psychological responses to light. In rare individuals an atypical response may result in serious discomfort, disease, or injury.
Most people in the world depend on the sun to get vitamin D, [31] and elderly populations in low UVB countries experience higher rates of cancer. [32] There are not many foods that naturally have vitamin D. [33] Examples are cod liver oil and oily fish. If people cannot get sunlight, then they will need 1,000 IU of vitamin D per day to stay ...
Sensitivity of the skin to a light source can take various forms. People with particular skin types are more sensitive to sunburn . Particular medications make the skin more sensitive to sunlight; these include most of the tetracycline antibiotics , heart drugs amiodarone , and sulfonamides .
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]
It took 10 doctors for someone to uncover the real diagnosis. I was told I had stage 4B Hodgkin’s lymphoma, a rare form of cancer that can affect people in their 20s and 30s. My response to the ...
"abdominal pain, diarrhea, potentially carcinogenic, with others can potentiate cardiac glycosides and antiarrhythmic agents" [3] Areca nut: betel nut Areca catechu "deterioration of psychosis in patients with preexisting psychiatric disorders"; [5] known carcinogen contributing to cancer of the mouth, pharynx, esophagus and stomach when chewed ...
Photophobia is a medical symptom of abnormal intolerance to visual perception of light. [1] As a medical symptom, photophobia is not a morbid fear or phobia, but an experience of discomfort or pain to the eyes due to light exposure or by presence of actual physical sensitivity of the eyes, [2] though the term is sometimes additionally applied to abnormal or irrational fear of light, such as ...
This vitamin was most likely selected by evolution for sensing light because retinal causes a shift in photoreceptor absorbance to the visible light range. [38] This shift in absorbance is especially important for life on Earth because it generally matches the peak irradiance of sunlight on its surface. [ 38 ]