Some people do win the lottery despite astronomical odds against their winning it. Lightning does strike twice.
One day in the clinic we were testing a couple of different machines to test the INR, a lab test we use to tell how thin a patient's blood is when they are on blood thinners. On three different, consecutive patients on three different machines I got identical results. That's a total of 9 tests. I don't even know how to figure the odds against that happening because the variables are too many to count. Yet, there it was, 3 different, consecutive patients, 3 different machines, identical results. If it had been one machine giving me identical results on 3 patient I might have wondered if the machine had been broken, or if I had done something wrong. But it was on 3 different machines. The odds are astronomically against that happening. But it happened.
Saying that the odds are astronomically against the eye developing through spontaneous mutation doesn't mean that it couldn't have happened that way. It only means it is unlikely. The eye is a weakness in macro-evolutionary theory.