I started on 200mg of amantadine back in 2001 when I first started on l-dopa. Within a week or so my feet and ankles began to swell to the extent that it alarmed my internest MD. He dropped the amantadine back to 100mg/day after conferring with my neurologist and the swelling abated in about another week. I have continued with 100mg/day since then. I don't know what its benefits are, but know that I read in pharmacology books that it is supposed to enhance the secretion of dopamine in dopaminergic neurons.
This is the first I have heard about amantadine complicating eye health or cataract surgery. Incidentally, my DW is having her first cataract surgery tomorrow (or today, since it is after midnight).
My opthalmologist said that my cataracts are not far enough along to mess with at this time.
Robert