As I do not own the book referred to I cannot check the specifics
go here:
Amazon book and find the "Search Inside This Book". search the word "eye". this opens the book to the table of contents. use the "Next result" tab to forward to the exact place where this is mentioned.
but I do know that "real" tea contain a lot of tannins
i always thought so, too. but we are wrong, says
Wikipedia .
Since the specifics about the tea isn't mentioned, don't go about dripping tea into your eyes.
you only get two eyes. personally, i wouldn't take a chance on losing one either.
where in sweden?