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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.
Photosensitivity is the amount to which an object reacts upon receiving photons, especially visible light. In medicine, the term is principally used for abnormal reactions of the skin, and two types are distinguished, photoallergy and phototoxicity .
It is a type of photosensitivity. [1] [2] The skin response resembles an exaggerated sunburn. The involved chemical may enter into the skin by topical administration, or it may reach the skin via systemic circulation following ingestion or parenteral administration. The chemical needs to be "photoactive," which means that when it absorbs light ...
Phototoxins are toxins that can cause allergic reactions in particularly susceptible individuals and which can cause dangerous photosensitivity in a much broader range of subjects. Phototoxins are common in: a variety of plants (including food plants where they may be a biological defence): many citruses contain essential oils that are ...
Photosensitivity is also found in some of the porphyrias. Nearly all cases of porphyria cutanea tarda [ 18 ] exhibit blister formation on the skin within 2–4 days of light exposure. Variegate porphyria [ 19 ] and hereditary coproporphyria [ 20 ] can also exhibit symptoms of light-induced blisters.
Body checking is the latest in a slew of harmful body image behaviors to be called out online. Young women are subtly flaunting their abs and protruding hip bones on social media.
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 ...
What a lot of people know about snakebites they probably learned from Westerns on t.v. Don’t do these dangerous things if you get bitten by a snake: Do not cut the wound or suck out the venom.