High refractive index glass, sure, on the one really weak eye. But the other isn't so weak and my glasses hung squew on my face. Also, trifocals and subsequently variable focus glass is super expensive. Variable focus plastic is cheaper. I can replace plastic lenses every other year, and they weigh less on my face.
I moved to plastic lenses five years ago 50 years into my life as a glasses wearer. How long have you had sub par eyeballs?
If I get another 5 years out of plastic I may flip back but I can't promise I'll remember to report back. I will be too busy growing a lawn, to curate very carefully so I can tell invited guests to get off it.
