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It's proven that low levels of dopamine result in depression, anxiety, etc. And low levels of dopamine just means a lack of production or intake by the dopaminergic receptors. If the lack of happiness results in disorders such as depression, what would a lack of light do?

I guess what I'm trying to ask is how do blind people who haven't always been visualy impaired deal with their day-to-day lives? I've heard rumors (very, very unreliable rumors) that once you stay in the dark for too long you'll start to go insane, but I haven't met one "insane" blind person yet, nor have I ever heard of one.

Also, why do their other senses strengthen? I read a question earlier about how someone trained themselves to write and read upside down, but then had trouble writing b's, p's and q's, apparently this was due to a process called "negative transfer", does this have anything to do with it? Less energy used meaning more available to enlarge the other's capabilities?

Thank you in advance!

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I don't know if this site is like many in SE, but can you provide and of your own research about this statement? I've heard rumors (very, very unreliable rumors) that once you stay in the dark for too long you'll start to go insane. –  anongoodnurse Jul 10 at 16:05
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When I say unreliable source, I'm referring to that of my memory.. I remember hearing it once or twice, I might have accidentally associated fiction with fact. Is that not what rumors are? The problem is I'm not too sure if it's an alleged statement from wherever it originated, or actual fact based off of scientific research. Nonetheless, it still intrigues me as I have thought about it but never took it into consideration to actually finding out about it.. Well, until now. I try to be as informative as I can, yet still vagueness always befalls my attempts to know more.. Sorry! @anongoodnurse –  Samir Chahine Jul 10 at 16:20
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I see problems with your question (sorry to nag.) What does dopamine have to do with light or vs. versa? Second, what does dopamine have to do with sanity? Third, if a fuzzy memory of prolonged darkness causing insanity intrigues you, did you google "does prolonged darkness cause insanity?" If there were such a correlation, would it not be fairly easy to find? Again, I don't know how this site works. But on other SE sites, it's helpful if you have done (and share) some research, such that the onus of understanding all that you're asking isn't on the user answering the question. –  anongoodnurse Jul 13 at 10:08

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