Lincoln Financial Field opened 10 years ago this summer, so it would seem rather soon for the Eagles to invest $125 million through 2014 to “revitalize” the stadium, as team chairman and CEO Jeffrey Lurie called it. But Lurie said the upgrades are essential to prevent the dwindling attendance that some NFL teams are experiencing as fans seek the comfort of their own homes with high-definition TVs and in-game graphics that they can’t get at games. So the Eagles are making physical enhancements, such as adding 1,600 seats in small pockets around the stadium, adding a ramp to link the upper decks in the Southwest corner, and an escalator on the West side of the stadium. They’re also upgrading the concession stands, improving the entry gates to allow fans easier access through security, and improving the signage. And they’re replacing the nondescript canvasses inside the stadium with actual images of the greatest players and most memorable moments in team history. But Lurie said, just as important, they’re making technological advances, such as expanding the two video boards with high-definition LED screens that will stretch the length of the board (the current video boards are bracketed by advertisements). They’re also increasing the Wi-Fi system so fans can get updates on games around the league and keep tabs on their fantasy teams. The video boards, seating expansion and the ramp won’t be done until the 2014 season. Everything else, including club suite revitalizations and pro shop expansion, will be completed for the home opener Sept. 15.