It’s unclear how long he will be out in the 50-50 Senate split, but the chamber is on recess next week until the week of July 11.
Leahy, 82, was born blind in one eye and has a “lifelong struggle with impaired depth perception,” his office said in a statement.
“He’s taken some notable dingers over the years, but this one has finally caught up with him,” his office said.
Leahy is expected to make a full recovery from his surgery and will begin physical therapy immediately, his office said.
His office told CNN it’s too early to know how long his doctors will suggest he stay out of the Senate. His absence would make it difficult for Democrats to pass something with a simple majority that at least one Republican senator will not vote for.