Jamieson, Fausset and Brown on Isaiah 59:10

10. grope--fulfilling Moses' threat (De 28:29).

stumble at noon ... as ... night--There is no relaxation of our evils; at the time when we might look for the noon of relief, there is still the night of our calamity.

in desolate places--rather, to suit the parallel words "at noonday," in fertile (literally, "fat"; Ge 27:28) fields [Gesenius] (where all is promising) we are like the dead (who have no hope left them); or, where others are prosperous, we wander about as dead men; true of all unbelievers (Is 26:10; Lu 15:17).