The incident was one of at least two situations where foul balls hit fans.
In the eighth inning, another fan was hit in the shoulder on a Craig Gentry foul that landed higher in the stands. Paramedics sent him to first aid at the ballpark, but he was released.
The more serious situation came when Nick Punto fouled off a Dan Jennings pitch in the seventh. Punto pulled a 93-mph fastball down the first-base side and into the second row of the stands. The female fan was hit in the face with the ball and was eventually taken out of the stands in a wheelchair. She left with paramedics out of the back entrance in right field.
Jennings struck out Punto on the next pitch for the first out of the inning and retired the next two batters in order.
Marlins manager Mike Redmond said that from his vantage point, it looked like the line drive ricocheted before hitting the woman.
"I couldn't really tell," he said. "I think she had sunglasses on but I couldn't tell if it hit her in the cheek or the eye, but it was square on and she had no idea it was coming. I think she just turned at the last second."
Joe Frisaro is a reporter for MLB.com. He writes a blog, called The Fish Pond. Follow him on Twitter