“Not getting enough sensory input” as a causal theory of depression. Anosmia as an example. By @slatestarcodex
A priori this seems unlikely, but it fits a lot of my personal experience, particularly with seasonal affective disorderhttps://slatestarcodex.com/2020/04/17/depression-the-olfactory-perspective/ …
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I treat SAD effectively with lights that are MUCH brighter than any commercially available. This works pretty well, but has drawbacks (they are hot, noisy, only illuminate a small area adequately, etc)https://meaningness.com/metablog/sad-light-led-lux …
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Replying to @Meaningness @slatestarcodex
Really excellent write up. Any research on what wavelengths are most effective for SAD? LEDs with small fwhm are startlingly efficient while “white” is either a blended balanced mix of 3 LEDs, or a wasteful secondary phosphor at work.
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Replying to @DavidRalin @slatestarcodex
I haven’t reviewed the literature in a few years. When I last checked, there as weak evidence that sky-blue light is what matters. Unfortunately most “white” LEDs produce a lot of deep-blue (which is possibly harmful) and not much sky-blue.
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Replying to @Meaningness @slatestarcodex
Yeah 455nm like “royal” and shorter contributes to corneal damage. So something slightly longer like 470nm “blue” or 505nm “turquoise” might serve. Problem is for daily prolonged use the very blue tinge might have its own perceptual/psychological issues.
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More research is badly needed.
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