Zimmer, who admitted that he still can't see out of his right eye, missed a regular-season game against the Dallas Cowboys in December after having emergency surgery to repair a torn retina.
The 60-year-old returned to the sideline the next week sporting sunglasses and a bandage.
"Hopefully that will fix it," Zimmer said, via the Dallas Morning News.
Zimmer had a torn retina in his right eye repaired following an Oct. 31 game at Chicago. He required a second surgery Nov. 8.