parallax effect

Apparently, the parallax effect shouldn't even be working on the iPhone 4, hence why you don't see the Reduce Motion option. But if people are experiencing the effect on their iPhone 4, it has to be a glitch. Unfortunately, I haven't come across a solution for your problem. Hopefully, Apple is aware of this, and will address on future updates. My suggestion for now, since the parallax effect intensity is determined by what image you are using. Some images, like pics of people, are more obvious with the effect than others. At least that's what I've found on my 4S. I use a flat graphical image (logo on a red background), and it's much more subtle than a pic of my kid, with Disneyland castle in the background. Hopefully, that helps. Let us know.

I'm curious, are you mistaking the zoom effect of the folders and icons for the parallax effect? The parallax effect is when the wallpaper moves as you angle your phone in different positions. The zoom effect is when you unlock your phone, close apps, and open apps.

Read my second last post. Explains.

That's not the Parallax effect. That's just how iOS 7 animates the icons. Not much different from iOS 6. Sorry to hear that it makes you feel motion sickness. Guess, some people are just more susceptible to that kind of thing. Unfortunately, there is no way of turning it off, it's just how iOS 7 is. Maybe Apple will address it if there are enough people who complain.