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This is really interesting, but the articles description makes no sense to me: > EnChroma’s technology works by placing a band of absorption on glasses that ca
by IanCal 12y ago
This is really interesting, but the articles description makes no sense to me:
> EnChroma’s technology works by placing a band of absorption on glasses that captures light, pushing the cones away from each other and reestablishing the normal distribution of photons on them.
The glasses are not pushing the cones on your retina apart (if they are you're probably wearing them a bit close), so what are they doing?
- privong 12y agoI think they mean the absorption artificially increases the separation of the mean response wavelength for both the red and green cones. Essentially it is reducing the overlap of their spectral response by filtering out the places where they can strongly overlap for the 99% of colorblind people with this type of colorblindess[0]. [0] 99% number is from the article. I have no idea if that's accurate or not. Edit: Clarifying wording, spelling
- notacoward 12y agoTypical science/tech Babel effect. Try EnChroma's own explanation. http://enchroma.com/technology/how-it-works/ http://enchroma.com/technology/how-it-works/ It seems like a pretty straightforward band-pass filter in the visible frequency range. I don't know enough about eye physiology or chemistry to say whether that would really have the effect they claim, but it sounds like plenty of people have already tried them and found them useful somehow.
- darkmighty 12y agoActually that description is sound conceptually: the cones' spectral absorption peaks are shifted apart with a stopband filter.
- im2w1l 12y agoI made an image to explain it. The grey area (conceptual, I don't know how big it is), shows wave lengths blocked by the glasses. As you can see those wavelengths give strong activation of both red and green cones. The remaining wave lengths activate just one or the other. This mean if a light source has both green wavelengths and yellow wavelengths, the filter will remove the yellow ones, making it look green instead of yellow. One form of color blindness arises when the green and red peaks are especially close, making a large span of wavelengths look yellowy. By filtering those out, the person can get color vision. http://i.imgur.com/dMlzKUN.png http://i.imgur.com/dMlzKUN.png
- bobbles 12y agoThats a great explanation, thanks