Updated

Zoo Atlanta's baby panda opened its eyes for the first time on Thursday.

Zoo officials made the discovery during a physical examination of the 36-day-old unnamed female cub.

"She's probably able to see now," said zoo veterinarian Dr. Maria Crane. "We noticed she's paying more attention to her environment."

• Click here to visit FOXNews.com's Natural Science Center.

Crane said it is hard to know how much Lun Lun's cub is actually seeing. The newborn appeared slightly startled at one point during her checkup when she noticed staff intently watching her.

The cub, whose name will be chosen in two months, has grown a little more than 16 inches (41 centimeters) in length in the past week and gained just under a pound, growing to 3.8 pounds (1.7 kilograms).

"She's a very solid cub," Crane said. "Her growth is nice and steady, and that's really a testament to how well Lun Lun is taking care of her."