This afternoon we went to an ophthalmology specialist to get Lisa's eyes examined medically (rather than for a change in prescription).  We found out that her loss of vision acuity and the problems she has in bright environments is due to cataracts -- but not the typical kind of cataracts that occur over time due to aging, but cataracts that are brought on as a side effect from her cancer treatments.  But unlike other side effects, they'll never go away, even if Lisa didn't still have to be taking chemo, but "standard" cataract surgery (lens replacement) would take care of it quickly.  Lisa hasn't decided yet whether (or when) to do it.