Four Eyes:
You require optical aid in order to see properly. Your Perception is reduced by one, but the effect of scopes, and binoculars is doubled, enabling you to see farther.
That's what wiki said. Does it mean when you put spectacles on in utility slot it fix your sight? Or does it work with scopes only? Or is there some other item like for example "corrective glasses" or something? I never saw binoculars here, only some kind of glasses and I just have to ask:P