Lenses can last for years when you take care of them. Some of those are 4 years old and we had even older ones!
Make sure you change lenses solution every time you use and if stored you should change every month fully while bathing them in solution like this.
Hope it helps
Kuja and LZ
2019-08-05 00:56:48 +0000 UTCAdrienne Figenbaum
2019-08-04 19:55:17 +0000 UTC