Mine seems to have deteriorated somewhat in anticipation of the event!
In fact, I have found, at previous points in my life, that the natural process of weakening of eyesight with age has tended to cluster itself around stressful events. In other words, rather than deteriorating in a straight line, I go by successive plateaus: things stay at roughly the same level, then shift down in connection with, or contemporaneous with, some major life event. It was that way when I underwent a major bout of depression 18 years ago: my organism also picked that time to move into bifocaldom!
Peter