Hello all, Many of you may know about a relatively recent app called OKO which detects pedestrian signals at light-controlled intersections and conveys this info to users through tones and vibrations. I recently wrote an article for the NFB blog detailing my thoughts about it. Here is the link to it in case you are interested. https://nfb.org/blog/does-oko-have-green-light-blindness-community Regards, Dezman