Here is the list of everything Hasbro will have to offer in regards to Star Wars: The Force Awakens. The Black Series Die-cast are an eyebrow raiser. I have seen pictures of a few things and got vague descriptions of case breakdowns on others. Amazon put our a blast pulling everything EPVII.
However, vision will not be clear. Wearing the incorrect vision prescription will not cause vision to worsen, but a person may experience eye strain and headaches as an effect of the wrong prescription. The front of the eye, called the cornea, may have a slightly different shape for many people.
Legal blindness relates to the best corrected vision after an eyeglass prescription is determined. You cannot look at the numbers on your eyeglass prescription to determine this. If the best you can do on an eye chart, with the best eyeglass correction, is 20/200, that is legal blindness in most states in the usa.