iOS 7 may be doing well in terms of adoption rates and selling iPhone 5S and 5C units, but the latest mobile OS from Apple is making people physically ill. Yes, as in throwing up and being sick.
The source of this is actually iOS 7's many zoom animations, mixed with the slight parallax effect that iOS 7 uses in order to create the illusion of 3D display layers such as home screen backgrounds. A poster on an Apple forum said: "The zoom animations everywhere on the new iOS 7 are literally making me nauseous and giving me a headache. It's exactly how I used to get car sick if I tried to read in the car. Any way to turn off iOS 7 navigation animations?"
There were more than a handful of users who were complaining of plenty of problems, such as "nausea", "headache", "motion sickness", "dizzyness", "eye strain", "vomit", "vertigo", "blurred vision", and "seizure" all over the thread. So, as you can see, it's not an isolated issue.