Melatonin reduces behavioral sensitivity but increases the eyes' sensitivity to light, causing them to be injured by light that would otherwise be harmless
2 Arguments
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2 Consequences
2 Mentions
Arguments
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 2Opposing Arguments
No opposing arguments found
Citations
No citations found
Consequences
Argument #e586e056 1 0 2
If it is true that...
Melatonin lowers body temperature, causes vasoconstriction in the brain, heart, and other organs, and slows reactions 1 0 2and
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 2Then it must be true that...
Retinal injury is caused by ordinary light when the eyes are sensitized by melatonin, prolactin, and polyunsaturated fats 1 0 2Mentions
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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 2The retina becomes easier to injure by light in old age for some of the same reasons that the infant's retina is susceptible 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