Despite earning $489 million since its release, Twilight’s Breaking Dawn-Part One has created controversy over the graphic nature of its birth scene. The scene has caused several moviegoers to have seizures and prompted the Epilepsy Foundation of America to give a warning through its website.

Sophomore Amanda Curtright has seen the movie six times.

“[The scene was] graphic, but it is not gory,” Curtright said. “There were a lot of flashing lights.”

According to a statement posted by the EFA’s website, these “flashing lights” can trigger seizures known as photosensitive epilepsy.

“If you have photosensitive seizures, please take this information into consideration when deciding whether to see this movie,” a statement posted on the EFA’s website said. “Around three percent of the nearly three million Americans with epilepsy have photosensitive epilepsy.”

In an interview given to ABC News Dr. Dan Lowenstein, director of the University of California San Francisco Epilepsy Center said that it is the frequency of the lights that causes the seizures.

“When the brain is functioning normally, there are neurons firing all over the place,” Lowenstein said. “During a seizure, there’s an abnormal synchronization that we don’t usually have.”

The problem, which starts in the visual part of the brain, can spread to other parts of the brain and that is when a seizure occurs. Similar light-induced seizures occurred in 1997 during an eposide of Pokémon , when over 700 people were hospitalized.

Curtright noticed the lights.

“I did notice how it was flashing, but it was not fast or anything,” Curtright said. “I did not see it have an affect on anyone, mostly people were screaming.”