Why is it called Ayin Hara (singular) shouldn't it be Anayim Raos (Plural)?
2 Answers
I think the answer is way more simple that that offered in the other answer: The first person to give an Ayin Hara or attempt it was Billam. He had only one functional eye. Therefore we called it Ayin Hara.
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The Chida in his Sefer Pnei David says since it is the way of people to close one eye it is called Ayin Hara he only uses one eye!!
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