If want your own gut check on vision, perfect time of year to pick up a pirate eye patch. Try it over one eye in your place for a half hour and then try the other. A lot of neurological vision problems relate to eye coordination. My "lazy eye" takes about three times as long to read as my other eye or both together. Executive function and attention can both be stressed by a brain over-working to compensate for a visual disconnect. If there is a big difference with the patch, you've learned something; if there is no difference you haven't learned much.
