What is the main cause of eye floaters?

Floaters: Floaters are thickenings in the vitreous jelly inside the eye. They are common with age, myopia, inflammation, trauma, and other issues. They are benign and do not damage your vision. Rarely, they can cause retinal tears which may require laser treatment. Otherwise, no treatment is needed. In very rare cases, the floaters can become dense enough to block vision and may need surgical removal.

Floaters cause: Floaters arise when the vitreous gel inside the eye liquefies naturally with age and sometimes earlier in life due to trauma, inflammation, or even high myopia. The floaters may consist of protein precipitates. Though the vitreous gel inside the eye is clear, it is composed of a complex matrix of collagen proteins that undergo changes. New floaters should be examined under dilation.

Floaters: 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.