> glasses turned everything upside down https://www.madsci.org/posts/archives/mar97/858984531.Ns.r.html https://www.madsci.org/posts/archives/mar97/858984531.N

> glasses turned everything upside down https://www.madsci.org/posts/archives/mar97/858984531.Ns.r.html https://www.madsci.org/posts/archives/mar97/858984531.Ns.r.h... """ [...] first investigated by George Stratton in the 1890 s [...] he ran another experiment where he wore it for eight days in a row. On the fourth day, things seemed to be upright rather than inverted. On the fifth day, he was able to walk around his house fairly normally but he found that if he looked at objects very carefully, they again seemed to be inverted. On the whole, Stratton reported that his environment never really felt normal especially his body parts, although it was difficult to describe exactly how he felt. He also found that after removing the reversing lenses, it took several hours for his vision to return to normal. [...] """