iOS 7’s parallax effect feature gives a 3D transitions that shifts and tilts alongside the device. The wallpaper is one prime example of its usage and it gives depth to the home screen icons by moving the background wallpaper as you move your device.
Some people are affected by the parallax effect and have even been physically sick due to the transitions. If you too are annoyed by it, or find it meaningless, or want to save some battery juice, you can turn it off.
In iOS 7.1, you can turn off parallax effect on background wallpaper directly when you are choosing and setting your wallpaper. Go to Settings > Wallpapers & Brightness. Tap “Choose a New Wallpaper” and select your new wallpaper as usual. In the Move and Scale screen, tap on “Perspective Zoom” to switch the setting to off. This will turn off the parallax effect. You can move and tilt your device to check out the effect.
In addition to the above “Perspective Zoom” setting, you can disable parallax effect by turning on Reduce Motion. Go to Settings app and select General > Accessibility. Under “Reduce Motion” settings, tap the switch to turn it on.