# The eyes of the Lord see the righteous

The word "eyes" refers to the Lord's ability to know things. The Lord's approval of the righteous is spoken of as his seeing them. Alternate translation: "The Lord sees the righteous" or "The Lord approves of the righteous" 

# his ears hear their prayers

That the Lord hears their prayers implies that he also responds to them. Alternate translation: "he hears their prayers" or "he grants their prayers" 

# the face of the Lord is against

The word "face" refers to the Lord's will to oppose his enemies. Opposing someone is spoken of as setting one's face against that person. Alternate translation: "the Lord opposes"