Are Knockaround sunglasses FDA approved and/or impact resistant? Yes, Knockaround sunglasses are FDA approved and impact resistant. If you have additional questions, please contact our Customer Support Team here. Related articles Which category do my Knockaround sunglasses fall under? Do Knockaround shades offer UV protection? Which Knockarounds fit my face best? Do you offer prescription (Rx) lenses? What should I do if my sunglasses broke? Comments 0 comments Article is closed for comments.