My current pair I bought for £14 online in 2012. Despite regular eye checks, my prescription varies so little, opticians have never suggested new glasses.
I have been meaning to buy a new pair for a while, just to have a second spare pair.
Anyway, as luck would have it, on Friday, I was out, and noticed a "smear" on my left lens. The glasses are actually plastic of some description.
However, no amount of washing/cleaning will shift this smear which actually looks like something has attached the plastic, or maybe one of the coatings ? It's definitely NOT a scratch.
Have tried washing up liquid) which is first line of cleaning. No good. Surgical spirit - no good. Isopropyl alcohol - no good.
Now have a spare pair on order, so it's not critical.
Just wondered if anyone had any ideas as to what it is ?
Weirdly a similar thing happened with my swimming goggles a few months ago. *Something* caused the reflective film to "smear" and could not be cleaned off.
<tinfoil hat time> Is it of note that I had an eye test 2 weeks ago, and the optician had to check my glasses/prescription ? </tfht>