Something that popped into my mind: if someone were to spray or splash water in my face, intuitively it would burn my eyes. Yet if one were to cry, their eyes wouldn't burn. What is the difference in these situations, considering it's just water in the end?

It seems even stranger considering the salt content in tears, since obviously our eyes burn when they come in contact with regular salt.


closed as off-topic by anongoodnurse, kmm, WYSIWYG, David, theforestecologist Jun 11 at 19:55

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    $\begingroup$ When do you get salt in your eyes? $\endgroup$ – kmm May 25 at 23:08
  • $\begingroup$ there is salt in your blood to, it is not about having salt it is about proportions of salt. $\endgroup$ – John May 25 at 23:23
  • $\begingroup$ @John Sure, but if you spray water in your eyes it'll burn. Why don't tears burn in the same way? $\endgroup$ – Sir Cumference May 25 at 23:33
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    $\begingroup$ I don't think the premise that getting water in your eyes burns is universal. You get water in your eyes incidentally every time you shower. Chemical eye wash stations use tap water. I just don't think that the idea behind the question is very well supported. $\endgroup$ – kmm May 26 at 0:13
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    $\begingroup$ @kmm -I think this is a poor question, and would ave substituted irritation for burning, but having irrigated a bazillion eyes - even with saline - I've observed this to be a pretty universal situation. $\endgroup$ – anongoodnurse May 26 at 2:54

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