You clearly do not understand the genetics of glaucoma. It affects about 1 out of 50 people that live a lifetime of 75+. Rates are higher in blacks and Asians. If your father was the only person in the last 2-3 generations to have glaucoma your risk of glaucoma is probably 4-6% and mostly after age 55-60. If you have your eyes examined yearly by a Eye MD with some extra glaucoma tests (nerve fiber layer OCT, visual fields, one time corneal thickness and gonioscopy) you should be able to diagnose glaucoma very early if it develops. Many new medications and lasers and surgical procedures are available now your father did not have.