In the second film why does Thorin think Bilbo has keen eyes? Bilbo finds a mountain sized dwarf carved into a mountain that they are all standing next to and for some reason Thorin thinks it means Bilbo has amazing eyes. Why is this? Are dwarves blind? Why can't any of them see it - seeing as how they all come from this mountain anyway - surely one of them would have noticed it before in the 100 or so years that they were living there. It is also a clear as day to the viewer of the film.
Thorin doesn't tell Bilbo that he has keen eyes because Bilbo found the giant carved dwarf, but rather because he found the secret stairs that led to the top of the dwarf and thus to where the secret keyhole is located.