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 Do Knockaround shades offer UV protection? Which category do my Knockaround sunglasses fall under? Which Knockarounds fit my face best? Do you offer prescription (Rx) lenses? Which Knockaround lenses are best for me? Comments 0 comments Please sign in to leave a comment.