Mstarling,
Your post was exactly my point, in that you can focus the front and rear sight and the target is a blur, but that's OK, that works fine....

Also you should be able to get some corrective lenses that will compensate for your sight loss I would think...

However, this is all up to you and how bad you want to use iron sights...I agree a glass sight can be fast but its near worthless if a charge gets in close and personal, it is near impossible to point shoot with a scope and they really fill that scope up when they get close, even on low power, then take into consideration the fact that as they close the scope POI differers from the actual Point of impact of the bullet, the gun starts shooting low inside 25 yards and gets worse as the gap lessons...

Just my IMO on the subject and we must all make our own decisions on these things, and I am sure no one person is correct for everyone.......