[bcaine]

It looks like this is just Pilocarpine, which has been used for decades to treat glaucoma, available at pharmacies everywhere, and is commonly used (perhaps off label) to shrink pupils. I wonder what if anything they changed compared to the generic version?

I've been using Pilocarpine off label to shrink my pupils at night after ICL surgery (an alternative to lasik) to solve debilitating halos caused by my pupils growing larger than the implanted lens.

In my experience, it does increase close range vision (at some minor expense to long range vision). That said, it also gives a mild headache, and blurs your vision substantially for the first 5-15 minutes after use. I don't really see the appeal of using it daily unless you really have to.

[epivosism]

supported by a couple searches eg https://en.wikipedia.org/wiki/Pilocarpine