Reduced vision in left eye from floater. what to do?

Floaters: A symptom like that with vision loss could indicate a vitreo-retinal pathology. You need to see a retinal specialist as soon as possible for them to rule out a retinal involvement beyond vitreous separation.

Floater: 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 or other problems with the eye.