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Paleo Diet Primal Sleep Problems Blue Light Blockers-min

Is Blue Light Ruining Your Sleep?

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How is your sleep? If you’re struggling to get to sleep – or to get a decent amount of sleep, have you though that the problem might lie with your circadian rhythms? And that exposure to blue light may be messing up your circadian rhythms?

How we’re supposed to sleep

If you go camping, away from towns and cities, you might have noticed you get tired much earlier than you would do normally? When the only light after dark comes from a camp fire, the signal to your body to produce melatonin, the sleep hormone. As soon as the sun rises the next morning, melatonin production slows down, telling your body it is daytime – and time to wake up and get going. For this reason light is absolutely crucial to your bodies internal body clock. The incredible range of sleeping potions on sale is surely proof at how widespread sleeping problems are.

Unfortunately the unnatural, man made lights that we all rely on, give off the same lights as the sun – signalling to our bodies that it is daytime. And most definitely not time to sleep. Blue light is everywhere; household lights, your computer, ipad, laptop, tv,street lighting, alarm clocks – it is hard to escape blue light. As well as messing up with natural sleeping patterns, excessive blue light exposure is also linked to increased cancer risk and an increased chance of obesity.

Paleo Diet Primal Sleep Problems Blue Light Blockers-min

How can we escape blue light?

Fortunately there are measures you can take to limit your exposure to blue light:

  • After sunset, turn off all bright lights in your house (use candlelight or orange or red light bulbs)
  • Stop using electronics after dark…
  • …But if you must use your computer after dark, install the free f.lux program to minimise blue light
  • Make your bedroom as dark as possible, install black out blinds (or go for the cheap option and stick card against the windows at night)
  • Sleep with an eye mask
  • Go one step further and wear blue light blocking glasses after dark (with orange, amber or red tinted lenses)

How well do you sleep? Do you limit your exposure to blue light after sunset? I’d love to hear your sleep tips in the comments below!

Giving the Paleo Treatment to Sunglasses blue light natural health eyes sight vision sun glasses-min

Seeing Things in a Whole New Light – Giving the Paleo Treatment to Sunglasses

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During the three years I've lived in Australia, I've spent a lot of time wearing Sunglasses (or, as they're more commonly known in Australia, Sunnies).  Even in the winter here, it's often very bright and sunny (even if the air is cool).  In the summer, it gets really bright and sunny.  Sunglasses – well, that's what they're for isn't it, wearing in the sunshine?

Sunglasses paleo treatment-min

The more I've found out about Paleo, the more I question other aspects of my life, sunglasses being one such example.

Whilst early examples of sunglasses have been seen as far back at the 12th century, they didn't become common until the early 1900's.  That's not even five generations ago.  Whilst correlation is certainly not causation, it is interesting to note that 25-35% of people of a European descent have Myopia (short sightedness) today, whereas a study of hunter gather tribes revealed Myopia in just 0.4% of the population (1) As well as diet, could widespread use of sunglasses be responsible for the widespread decline in eyesight?

Some estimates suggest Indigenous Australians have been here for up to 70,000 years, surviving for 69,900 without needing sunglasses?  Why are they now they essential for optical health?

Sunlight entering the eyes takes two courses – one for vision, the other goes to the hypothalamus gland.  This pathway seems to have a crucial role in the body clock, energy and hormone production (including melatonin).  It would make sense for the body to use this pathway to regulate circadian rhythms.  Circadian rhythms ensure sleep and wake cycles occur properly, and that the body is in tune with seasonality.  Therefore doesn't it stands to reason that wearing sunglasses, and reducing the sunlight entering your eyes, will impact these functions?

This would tie in with anecdotal observations I've heard that when not wearing sunglasses, people get less sunburnt, then when they do wear sunglasses.  Perhaps wearing sunglasses also leads to people staying out in the sun for longer than they would without sunglasses?

In the spirit of n=1 self experimentation, I'm going to wean off the sunglasses this summer and see what (if any) impact it has on me.  Will my new found improvements in my sleeping patterns improve further still?  Will my eyesight improve?

I'll report back in a future post any differences I've noticed.

Do you wear sunglasses?  Do you think it is foolish not to wear sunglasses throughout the Australian Summer?  I'd love to hear your thoughts in the comments, below!

Giving the Paleo Treatment to Sunglasses blue light natural health eyes sight vision sun glasses-min