LOWLIGHT
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Articles from BLUR-IT on screen light, the body clock and the LOWLIGHT lenses, with sources.
WINTER LIGHT
Gothenburg gets 6 h 32 min of daylight at the winter solstice, Kiruna none. The researchers' targets for daytime and evening light, and where a lens fits in.
BLUR-IT · · 6 min
BUYING GUIDE
A percentage without a wavelength band says nothing. Three questions that expose an unmeasured claim, and what our own lenses filter, band by band.
BLUR-IT · · 7 min
#BLURMAXXING · THE SCREEN
Your phone turns orange at night because blue light is read by the clock in your eye. Yet melatonin still dropped in 12 people with Night Shift on. Here is why.
BLUR-IT · · 6 min
#BLURMAXXING · HISTORY
The oldest eye protection against the sun is Inuit snow goggles, about 2,000 years old and made for snow glare. The smoky quartz judges have no original source.
BLUR-IT · · 6 min
#BLURMAXXING · THE EYE
Beyond rods and cones, your eye has cells that do not see images but measure light. They are most sensitive to blue around 480 nm and set your body clock.
BLUR-IT · · 6 min
#BLURMAXXING · SPACE
Astronauts slept about six hours out of eight and a half. NASA replaced the ISS fluorescent lights with LEDs that turn warm and dim before sleep. How it works.
BLUR-IT · · 6 min
#BLURMAXXING · FIRE
Fire was long the only light after sunset. A flame is about 1800 K, with almost no blue. A week of only sun and campfire moved melatonin two hours.
BLUR-IT · · 6 min
GAMING AND LIGHT
Orange lens while you play, red when you stop. What the studies on LED screens and gaming before bed show, and what they do not show.
BLUR-IT · · 7 min
SLEEP AND LIGHT
Evening screen light suppresses melatonin and shifts your body clock. How it works, what the studies show, and what an orange or red lens filters out.
BLUR-IT · · 7 min
THE RESEARCH
Cochrane found no effect on eye strain, but mostly tested clear lenses filtering 10–25% of blue. Evening lenses are a different product. How to read it.
BLUR-IT · · 6 min
LENS GUIDE
Choose your lens by the clock. Yellow for the day, orange from sunset, red for the last two hours. How the lenses differ in filtration and wavelength band.
BLUR-IT · · 5 min
WINTER ARC
Winter Arc is about routines when days get short. What most people miss is light. A protocol for morning, day, evening and night, built on the research.
BLUR-IT · · 6 min