Pero glasses keep or donate ??

If I remember correctly, those glasses are useful for the tower-type event, which it's supposed to happen in the future.
I'd say keep them, unless you're really in a hurry to get a certain card.

According to the point table from the first post, glasses worths less points than a R-Gacha ticket (which you can easily get daily), but worths the same as a peronamin, which is also good for donating.

So for my 5 R tickets and one peronamin i received a whooping 40 candies and 2 pero puddings. Stupid squirrel...

Just received 15 candies and the R card using an R gacha! That took a lot of pero to get though compared to the SR and N. I have 200 candies but I don't know what there use is. Has anyone else looked into their use?