Eye floaters from serious eye trauma like a fist in the eye?

Possible emergency: Tiny spots/ordinary eye floaters are very common and usually aren't cause for alarm. But if you see a shower of floaters and spots, sometimes accompanied by light flashes, then seek emergent care. When the retina is torn, eye’s gel-like vitreous can invade the opening and push out the retina, leading to a detachment.

Can happen: It sounds as if you have had a posterior vitreous detachment. This is a situation where the vitreous(jelly) of the eye detaches (not a retinal detachment), it then "crumples" up leaving dots, spots, strands of blurry vitreous; i.e. The "floater". You should have an exam to ensure the incident did not tear the retina, which could lead to a retinal detachment. Wait one year then consider surgery.