Last month, we told you that the parallax feature and the way that iOS 7 zooms into apps was causing some iPhone users to get motion sickness; those sensitive to the new features were complaining about getting vertigo, nausea, and headaches. Turning off the parallax feature (go to the Accessibility menu in iOS 7 and choose "Reduce Motion") will help if that is the issue, but you can not eliminate the zoom feature...
Source: http://www.phonearena.com/news/Is-iOS-7-making-you-dizzy-Jimmy-Kimmel-has-the-answer_id47906
Source: http://www.phonearena.com/news/Is-iOS-7-making-you-dizzy-Jimmy-Kimmel-has-the-answer_id47906