Back in the mid-90s, my boss had cataract surgery on one eye, which gave him 20/20 vision in that eye. After that his glasses had one Rx lens (for the non-corrected eye) and one plain lens (for the post-cataract eye).
I imagine the doctor will have a solution like that for your friend, since I'm sure they deal with it all the time.
I have a friend who is having cataract surgery soon. She had lasik some years ago, but still wears glasses for reading. I will have to ask her if she will be able to lose the reading glasses after the surgery.
- Gray 2010 carbon WSD road bike, Rivet Independence saddle
- Red hardtail 26" aluminum mountain bike, Bontrager Evoke WSD saddle
- Royal blue 2018 aluminum gravel bike, Rivet Pearl saddle
Gone but not forgotten:
- Silver 2003 aluminum road bike
- Two awesome worn out Juliana saddles