You are greatly exaggerating the risks of OHT. First it may not ever turn into glaucoma. Second if it does treatment would be able to be started early. Less than 1% of glaucoma patients that are diagnosed early and use their medications and are followed by an ophthalmologist 'go blind'. Most blindness from glaucoma comes from late diagnosis or not taking medications or returning on a regular basis to an ophthalmologist. First be sure you are getting your eye care from an Eye MD ophthalmologist. Their skills are greater from determining when or if OHT would need treatment. The risk of getting glaucoma cannot be predicted without know things like: your family history of glaucoma, the level of pressure, the thickness of your cornea, your baseline visual field, your nerve fiber layer OCT and refractive error. So at this point the best thing is be sure you are seeing an Eye MD ophthalmologist that treats and is competent in glaucoma management. And stop worrying so much, risks are low if you are compliant.