There is one kind of high eye pressure (acute angle closure) that can lead to glaucoma that may be accompanied with redness and eye pain, but this is more rare and happens more quickly. Otherwise, most forms of glaucoma (normal tension and open angle glaucoma) are extremely slowly progressing and don't have any symptoms until it's too late, when lose your side vision and are left with tunnel vision.
Quadrant Eye uses some tests which can help to screen for glaucoma even when you have no symptoms. Thank you Quadrant Eye for making a higher quality online screening! I can't wait for the entire comprehensive eye exam to be available at home and reach more people who otherwise may not have easy or convenient access to a doctor's office on a regular basis.
As far as the drops go, its a a brand-name drug. My doc suggested that there was a generic option available but it was also clear that it wasn't her preference. The signup process was online and as part of it I had click through on an agreement that said I wouldn't try to claim it on my insurance. I don't know what happens if you violate that. Maybe they refuse to give you refills. There were other suspicious aspects and dark patterns in the UI of the signup process; it smelled like a moneymaking scheme.