Hacker News new | ask | show | jobs
by chansiky 2148 days ago
> "The technology is simple and very safe, using a deep red light of a specific wavelength, that is absorbed by mitochondria in the retina that supply energy for cellular function."

Interesting, I would have never thought that we have cells that use light as energy.

Also, is this deep red light found in sunlight as well? As in, does this treatment only work with light that is restricted to this wavelength, or does it work with any light that contains ample amounts of this wavelength?

I know its been coming up here and there that we are just not getting enough sunlight in general with everyone studying indoors, working indoors, exercising indoors, etc. Just seeing if this is a broader issue of people not spending enough time in the great outdoors.

3 comments

Sunlight has tons of red and infrared light (red and near infrared have mostly the same effects on cells, the main difference being penetration distance).

Light is ridiculously important for mitochondrial health, and that effect on mitochondria is one of the main reasons sunlight is so necessary for optimal health. Fun fact, 75% of potential ATP production only results from light exposure, with only 25% from food. We run on light more than we do food (necessary nutrients and minerals aside).

> Fun fact, 75% of potential ATP production only results from light exposure, with only 25% from food. We run on light more than we do food (necessary nutrients and minerals aside).

This is fascinating. Would you care to share literature that dives into this?

This is about light hitting the retina, not the eye overall. That outdoor light is brighter across the spectrum, triggering the iris to protect the retina from overexposure. So you may very well get more red light onto your retina from a red lamp on your gaming desk indoors than by going outside in bright white light.
I recall reading about this topic recently actually. There does seem to be a connection, at least in children. https://www.livescience.com/52177-kids-outdoors-lowers-risk-...