An ERJ170 First Officer reported being pushed from a gate and contacting the jet bridge with a wing tip. He also reported several deviations from SOP; including no communication with Tug Driver and no lighted wands.

Narrative

During pushback from gate in ZZZZ; both Captain and I commented as to how close the jet bridge seemed during the pushback -- pullout being done by the ramp crew. We had NO communications with the tug driver; and the ramp personnel were not wearing reflective vests or lighted wands. If they had been; the Tug Driver may have been able to see the Wing Walker in time to prevent the wingtip striking the jet bridge. Captain was watching the left wing very closely; but due to it being dark outside and trying to see the Wing Walker through a terribly scratched up left window; he was having troubles. By the time Captain saw the Wing Walker waving his hands frantically to stop and reacted immediately by slamming on the brakes; it was too late and the wingtip struck the jet bridge. After getting the OK to get tugged back to the gate; pictures were taken and Maintenance was called to come and inspect the wing. After being signed off; we flew the plane back to ZZZ that night with no further incident. Conclusion: Headset communications with Tug Driver. Wing Walker with lighted wands. Pushback well clear of jet bridge. Repair left side window so we can see out it.