[NBC News]

Apple’s new iOS 7 software is apparently making some people seasick on solid ground. Experts on motion sickness say the sharpness of the screen and the motion of the icons may be partly to blame.

Users who have upgraded to iOS 7 are reporting nausea, headaches and vertigo in a message thread that started Sept. 18 on Apple’s support website.

“I just used my phone for about 20 minutes, and now I feel like I’m going to vomit,” one user wrote in a comment on the site. Another said, “It’s exactly how I used to get car sick if I tried to read in the car.”

iOS 7 has animations and a dynamic background that were not in previous versions of the software, which is used on iPhones and iPads.

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