Karol Watson, MD, PhD, co-director of preventative cardiology at UCLA, said that the study is theoretical and needs more data to show the risk is real.

CNN: Study: Headphones could interfere with pacemakers

Noticing that children with anger control problems are often uninterested in psychotherapy, but very eager to play video games, Jason Kahn, PhD, and Joseph Gonzalez-Heydrich, MD, at Boston Children's Hospital developed "RAGE Control" to motivate children to practice emotional control skills that they can later use in challenging life situations.

ENGADGET: Researchers create video game that monitors heart rate to keep children's anger in check

"We are thrilled to be able to offer the only FDA-approved long-term therapy for people suffering from advanced RP, " said Robert Greenberg, MD, PhD, President and CEO of Second Sight.

ENGADGET: FDA clears Argus II 'bionic eye' for sale in the US (video)