Sometimes things work out well. Six weeks ago, I had an issue with my right eye. The eye doctor was very thorough and the diagnosis was clear; the vitreous humor was pulling away a little, causing me to see a little flashing and a boatload of floaters. The symptoms have pretty much subsided since then. Today I went for a routine followup visit - and he found a tear in the retina of that eye. It wasn't there six weeks ago, and it's not impacting my vision. So, if I hadn't gone for this appointment, I may not have known for a while and done permanent damage to that eye. They're going to do surgery on that eye tomorrow morning, which is great.
The only downside is that I can't do any lifting or running or much walking until they do the surgery. This means my sons will have to mow the lawn. Am now hoping that he'll tell me no strenuous activity until the summer is out and the grass stops growing.