Melatonin does not reduce behavioral sensitivity nor does it increase the eyes' sensitivity to light, causing them to not be injured by light that would otherwise be harmless
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Argument #ce32d709 1 0 2
If it is true that...
Melatonin can act as a pro-oxidant at physiologically relevant concentrations 1 0 2and
Almost any kind of stress increases the formation of melatonin 1 0 2Then it must be true that...
Melatonin reduces behavioral sensitivity but increases the eyes' sensitivity to light, causing them to be injured by light that would otherwise be harmless 1 0 2Citations
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Related Propositions
Retinal injury is caused by ordinary light when the eyes are sensitized by melatonin, prolactin, and polyunsaturated fats 1 0 2Bright light isn't harmful to the retina if the retina isn't sensitized 1 0 2Melatonin, tryptophan, fish oils, St. John's wort, and omega -3 oils increase the risk of retinal light damage and macular degeneration 1 0 2Substances that sensitize the retina to light-damage can increase the incidence of new or metastatic cancers 1 0 1Melatonin can act as a pro-oxidant at physiologically relevant concentrations 1 0 2Almost any kind of stress increases the formation of melatonin 1 0 2Melatonin lowers body temperature, causes vasoconstriction in the brain, heart, and other organs, and slows reactions 1 0 2Melatonin reduces behavioral sensitivity but increases the eyes' sensitivity to light, causing them to be injured by light that would otherwise be harmless 1 0 2Melatonin's ability to cause vasoconstriction means that stress makes supplemental oxygen more toxic 1 0 1The nocturnal/stress hormones, especially prolactin and melatonin, make the retina more sensitive to light and more easily damaged 1 0 2