Why can I not wear my old glasses after cataract surgery?

Why can I not wear my old glasses after cataract surgery?

The new implant’s focus power is different that your old natural lens’ power.   Your glasses need to change to match the new focus power.

Often your lenses in your glasses can be swapped out. 

Sometime immediately after surgery (too soon for an Rx)... it is better to pop out one spectacle lens and wear the glasses mono!