Is it safe to wear circle contact lenses even if I have astigmatism?

I use Acuvue Contact Lenses for Astigmatism for about a year now. And I was wondering if I can wear a normal contact lenses? Like the Circle Lenses. I heard from someone I know that also have astigmatism that she is wearing circle lenses from Geo, not the Toric or the one for astigmatism. Is it safe? Will it damage my eyes?

And do you know any site that I can buy circle lenses?

Thanks!

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