Only 'Lady' i can think of is Galadriel. Somehow Celeborn and Galadriel don't fit. "Lady" -- Goldberry if I stretch it. All that stuff about 'maiming' could be hueing of trees and limiting of Bombadil's realm.
Eyes and sight halved? No idea at all.
Manwe's sight comes to mind for the reference to vision. But, I don't recall it ever being halved or limited, unless I stretch it - say the Straight Road and his vision and so on. Sounds ridiculous - hahaha and I'm chuckling as I'm writing.