I presume that you are familiar with the medical meaning of the term "cataract." Captain Rhino's excellent comment# 5 describing current choices for people with cataracts is the same as it was 15 years ago: stay blind or extremely nearsighted without surgery or get an intraocular implant that makes you either nearsighted or farsighted in the affected eye while still needing glasses.
The visual cortex in the back of your noodle doesn't appreciate discordant images.
“...in the back of your noodle?” Obviously a technical term!
LOL!