1)
Why does it say "Ad Yashkif"?
1.
Ibn Ezra: It is as if there is a window in Shamayim, from which Hashem looks.
2.
Ri Kara: I will not cease crying until Hashem sees.
3.
Refer to 3:48:2:2*.
2)
What should Hashem see?
1.
Ibn Ezra: The rivers of water that descended from my eye.