A doctor confirmed that the iOS 7 that powers Apple's iPhones and iPads could make people carsick. UH Medical Center Division Chief of Family Medicine Dr. George Kikano told FoxNews.com that the iOS 7 could make some people nauseous.

"There's some validity to this, for people who are susceptible. But it's not the zoom animations that are responsible. It's a new "parallax" function that causes the background of the phone to subtly move back and forth, a feature that leads to an effect not unlike car sickness," he said. Kikano likened the effect to watching a movie in an IMAX theater. "The inner ear is responsible for balance, the eyes for vision. When things are out of sync you feel dizzy, nauseous. Some people get it, some people don't, and some people get used to it," he added.

Apple's iPhone 5s and 5C sold 9 million units in its opening weekend. According to a Bloomberg Businessweek report, the total iPhone sales in the last four quarters outranked that of other companies, including Microsoft, Goldman Sachs, Amazon, Dell, Google and Pfizer. The report further said that if iPhone was a standalone firm in the Standard & Poor's 500-stock index, it would also do better than the 474 firms listed there.