From young I played competitive sports, then all at once as a young adult I found I was having some trouble seeing at night and then things got slightly less than clear in the day.
The day before I went in and found I needed glasses I won an Open tennis tournament with a doubles partner where I was returning serves well over 110MPH.
I had 20/50 20/70.
I can only think that at that time I was working with an early computer with a 5 inch monochrome screen and I had to punch in lots of numbers for reports a couple of hours a day. I was playing tennis at that time 2-3 hours a day during the week as well, so my eyes got plenty of exercise.
They have not altered now for 16 years and it beats the heck out of me as to why I ever went from great, to off, and then no more changes.
Just weird.
Reagan is King sounded like an eye doc. I was hoping for a more informative explanation. I'm just a family practice doc.
Sorry I missed your post earlier. How old were you when you made this nearsighted (myopic) change? If you were under 18 or so then the eye was still elongating and along with growth spurts in height, can result in fairly rapid myopic changes. This is why kids and teenagers change so fast. There is some research that also indicates that prolonged near work can increase the these changes as well. Great job on winning tournaments even with that reduced vision!