It seems I learn something new every day about our visual system. Thanks for sharing. Last week, it was a link to Technology Connections' video on the colour brown[0].

I also really enjoyed reading Foone's older blog post, "The EYES Have It"[1].

[0] https://youtu.be/wh4aWZRtTwU [1] https://foone.wordpress.com/2019/03/01/the-eyes-have-it/