49ers left tackle Joe Staley spent an extra night in Philadelphia after the team’s Week Eight loss to the Eagles because he was undergoing evaluation for an eye injury suffered when he was blocked by Eagle defensive tackle Fletcher Cox during an interception return. Staley was diagnosed with a fractured orbital bone and missed last Sunday’s loss to the Cardinals, but he appears set to return to action this week. Staley was a full participant in practice on Friday and was not given a designation on the team’s final injury report ahead of this weekend’s game against the Giants.