Even when walking in -20 C weather the rest of my body will get cold and get numb, yet even though my eyes are exposed to such cold temperatures they always seem to stay warm and wet.
In: Biology
This is a faulty premise. Eyes do get cold, but -20C is only -4F, which is not so cold that it’s hard for your blood to keep them warm. But try walking around outside at -44 (which is the same in C and F). You will feel your eyeballs get cold just like any other exposed body part.
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