![]() The reason why the glasses worked better outdoors is because nature produces colors in much more continuous spectra than mixing pure RGB dyes together.Ĭomparing the transmittance spectra of Enchroma indoor and outdoor glasses with the spectra emitted by a typical LCD monitor that uses RGB pixels. No wonder they didn’t make Ishihara test easier. Comparing the transmitting spectra of the Enchroma glasses with the spectra coming out of a monitor, we see that the glasses block precisely in the regions that monitors don’t produce. Pure colors have sharp spectra that wouldn’t be filtered out by the Enchroma glasses, so it would make no difference. He hypothesized that the reason these glasses didn’t work for computer monitors is because monitors transmit colors as a mix of pure red, green, and blue (RGB) pixels. Just as Enchroma describes on their website, these glasses block out a region between red and green that removes the overlapped region and as such, allows for much more discrimination in these colors. He ran the glasses through a UV-Visible spectrophotometer to see how light was being modified as it passes through the glasses. I think I could’ve if I stared for a long time to think about it, but with the glasses, the red petals really pop as red.”Ībdullah Syed is a microscopy and imaging expert. “Those flowers in the shadows – I normally wouldn’t have seen them because the flower petals blend in with the leaves. Suddenly, both testers started noticing differences they hadn’t seen before. We were slightly dejected, but when we went outside, things started to happen. Nor did the color blind test with the colored dots and numbers (Ishihara test) seem any easier when we did it on a computer monitor using the indoor glasses. So, the glasses work and are sometimes useful.īut images on a computer monitor, such as fluorescence microscopy images filled with reds and greens and blues, didn’t look any different. Interestingly, the Enchroma glasses also brought out a subtle hue of blue-green in a chromatography column that was invisible without them. Julien wore contacts, which are okay.)įirst, a few obvious differences were noted, namely that select oranges became much more red and vibrant. Enchroma does make glasses that fit over prescription eyewear. Enchroma told us the glasses do not work worn over the top of prescription glasses as peripheral light enters the eye, skewing the ratio of light, but we tried it this way anyhow. (It’s of note that Abdullah tried the Enchroma glasses on top of his regular prescription glasses. Abdullah and Julien tried the pair intended for indoors first, in a chemistry laboratory environment where brightly coloured liquids and plastics were aplenty.
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