Hello Mr. Richardson,
Retinal cysts can be dangerous. These may be the precursors to retinal detachments. If the vision is blurry, that is a clear indication that the ophthtalmologist should be seen as soon as possible. If the cyst expands to include the macula (area needed for clear vision) or if it is associated with a retinal hole then treatment is needed. This treatment may involve laser application to prevent a retinal detachment or actual surgery to reattach the retina, if it is already in the process of detaching.
There is no way to prevent cysts from occuring again in the future. Typically, they can only be managed once they appear.
Again, I recommend that you visit an ophthalmologist as soon as possible for a complete dilated eye exam.
I hope this helps...