My dad has glaucoma and did the same surgery. Not much improvement after 1 year has passed. Another eye doctor says it might take another 4 years to see some difference...

Similar experience here. A friend of mine had glaucoma but also did some surgery to remove a calcium extract from the eye. It helped a little but the vision is still the same

I was struggling with this yesterday

That's why few companies who make differences make history and most are forgotten.