Why not make them only obtainable once per character, that way high level players can't grind through lpq, ruin their glasses and repeat untill they get perfect stats? Also, coupled with the fact we dont have SoK, I cant see the glasses really posing a problem in being over powered. Now, lets talk about squishy shoes!
Oh, once per character I thought was unanimously there already. The thing is not economy value, the thing about overpowered glasses it that it lowers the value of all other eye acc.
You'd have to be really lucky to get +5 on any of the four stats with the one slot and there are better things out there that give more int/dex/acc so it would not undermine the value of other eye acc unless you're a job that requires a different main stat like str and luck. You were permitted one pair [of glasses] at a time. They worked like zhelms. Its the most tedious thing to do as well, 35 consecutive lpqs isn't fun and if you lagged out during the pq it didn't count, nonetheless 70 if you decide to go for another pair.