You have asked 21 questions, almost all the same. It is not likely you have glaucoma and unlikely at this time you need latanoprost. With a thickness of your cornea of 596 and the pressure taken by tonometry the true pressue in the eye is about 4 points less. Even if you do have glaucoma the latanoprost is lowering your IOP to ultrasafe level, the med is not expensive and has few side effects. Some ophthalmologists would NOT treat you and follow with regular glaucoma tests, others would leave you on latanoprost. I'm not commenting further. If you don't get the picture after this many posts, I don't have anything further to say. Your fear of going blind is unfounded if you stay with your ophthalmologist.