I had a cataracat surgery 2 months ago and use the same drops.
In my case IOP 12 hours after
surgery was 24, but 5 days after it was already at 17, but, as I use glaucoma drops, they helped keep my IOP below 20. You wife IOP should go back to normal when she stops use the drops, which should not take too long. In my case I used Prednisolone for 28 days. Confirm with your doctor, but I think a month is not enough time to cause harm.