prescription glasses (bifocals)

+1 on the Progressive - Transition lenses.  Actual bifocals are a pain. I have a pair that I only use for fishing - cause I don't care if I lose them.
Bi-focal lenses correct distance vision on the upper portion and near vision on the lower. A tri-focal lens has an additional intermediate distance correction directly above the near vision correction. Some multi-focals have noticeable lines dividing each area of correction. Progressive lenses render the lines invisible and the distance and near corrections are blended in a gradual progression

I don't recommend the non-reflective coating. They say they it lets in more light which is good and helps you see better, but they are impossible to keep clean  and in the end you end up seeing less clearly