> In any case, our human eyes are actually really, really good. A dark-adapted human eye may be able to detect light levels as low as a single photon: https:/

> In any case, our human eyes are actually really, really good. A dark-adapted human eye may be able to detect light levels as low as a single photon: https://www.nature.com/articles/ncomms12172 https://www.nature.com/articles/ncomms12172 (Not reliably, mind you. But the fact that this works at all is incredible.)