BOSTON -- A local eye doctor is raising awareness about a dangerous trick more and more kids are doing these days.

As NewsCenter 5's Heather Unruh reported Wednesday, it involves a product we all have around the house.

"I felt like a bomb was just exploding on my eye," said Amanda Grassia, 16, of Billerica, Mass.

Grassia will never forget the day she injured her right eye in a freak accident two years ago.

"I couldn't see anything for like five days," she said.

The trauma was the result of a trick involving a plastic water bottle. Grassia said it's a popular game kids play.

"They don't really think anyone is going to get hurt," she said.

There are instructions of how to do the water bottle experiment online.

"The kids would empty it out, loosen the cap, and then twist it, and then bang it. And then this bottle cap just ends of being this projectile that causes a lot of trauma," said ophthalmologist Shiyoung Roh, of Lahey Clinic.

Roh has been treating Amanda since the day after she was injured.

"She could only see hands in front of her," Roh said.

Without surgery to relieve pressure on her damaged eye, Roh said Grassia could have gone blind.

"The whole eye was covered with blood," she said.

Roh wrote an article on the incident that was published in the New England Journal of Medicine warning parents about the long-term consequences of the water bottle trick.

"She's always at risk for developing glaucoma," Roh said about Grassi. "She will mostly likely develop a cataract in her right eye much sooner than her left because of the trauma."

"I just think it's really important for people to know what can happen," Grassia said.