I Started Taking Biotin Last November For Beard, After A

i started taking biotin last November for beard, after a month or so of taking i started feeling weirdness in eyes...one morning i woke up and wiped me eyes and it left a bruise under both eyes...i stopped taking biotin that day but since then..my eyes burn and always dry...been to hospital twice and eye doctor twice..haven't made any ground..they say its not biotin, but it has to be...never had any eye issues before...help!!!!