A few years back one eye got better. Annoyingly it dropped the value of the nhs voucher I got to about £13 from £28 iirc. One eye -10.25 & the other became -9.75 from the previous -10.25. Still, I always get free eye tests every 2 years but that missing voucher value really was noticed!
Seriously, what use is that voucher? No glasses cost that little and with my prescription the lenses would not be useable because of edge distortion. As I found out with work provided safety glasses. It's like no straight lines are possible looking through them. Not good when I'm a quality engineer needing to measure and read engineering drawings! Lucky if I get change put off £300!
Oh and 4 or so years ago the optician said I was close to needing reading glasses. I got the offer of them but was up to me so no! I'm holding that day off as long as possible. Varifocals? Jeez! With my prescription I'd need a mortgage on them! However I accept that it's going to go down that way eventually.
Oh and then the optician says you need blue light filter driving glasses to safely drive at night! Add in my need to get fl41 tint glasses for health reasons. Let's just say I'm the guy who earns the optician her annual bonus!