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I don't get this article. The laptop I'm reading this on has a maximum brightness of ~300 lux. Its emission spectra looks something like this [1]. In compariso
by tristanj 10y ago
I don't get this article. The laptop I'm reading this on has a maximum brightness of ~300 lux. Its emission spectra looks something like this [1].
In comparison, indirect sunlight from a clear sunny day is around 10,000-20,000 lux. Its emission spectra looks something like this [2], with significant amounts of "harmful" blue light.
So, I don't get this article. Why does the blue light from my laptop cause blindness, while the 30-50x brighter indirect sunlight seemingly doesn't?
[1] http://scienceblogs.com/principles/files/2014/02/display_comp_white.png http://scienceblogs.com/principles/files/2014/02/display_com...
[2] https://cdn.comsol.com/wordpress/2016/01/Emission-spectrum-of-natural-daylight.png https://cdn.comsol.com/wordpress/2016/01/Emission-spectrum-o...
- tzs 10y agoNote that the peak region on the clear sunny day spectra is around 475 nm. That's near a deep local minima on the laptop spectrum. I wonder if that could lead to errors in dilation adjustments in response to brightness changes? It would make sense for that mechanism to give greater weight to those wavelengths where the eye is most sensitive. If it does that, it could judge the laptop as less bright than it really is, and so open the eye too far.