Of course the further you use the phone from your face the less the lines appear, however in normal use at normal distance they do show on certain colours such as dark greys and blues when you shift your focus around the screen.
I wouldn't have been that bothered but my wife's 5s is the exact same as my 4 and 4s before it. I suspect it's simply down to a different panel manufacturer being used although we have no means to prove this without opening the devices and were not going to do that.
At the end of the day I know what I'm seeing on my phone and not seeing on my wife's and have used enough retina display enabled devices (including my iPad 3 and now iPad 4) to notice subtle differences. The lines are also, for some reason, more visible in lower light conditions such as the bedroom.
If your iPhone doesn't have them then I think that's fantastic, I really do. I'd love a screen without one but will make do with what I have.
This "issue" is far more common than I think you allow yourself to realise.
And regarding Migraines, well I don't need told what does and doesn't trigger them, especially by someone online. I've had them since age 19 and am now 34. I've had symptoms ranging from one sided thumping headache to aura to one sided paralysis and been for CT scans to rule out strokes and other causes. All Migraines. So I'll kindly ask you to refrain from telling me what can and cannot cause them, thanks.
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On iPhone pinch and zoom on the grey head/shoulders on the contacts icon. On iPad or desktop it's clearer obviously. It's not a difference of the camera focus, the vertical lines through the first image are what intrude on grey and blue solid images on the screen.
The point is not that you need to get so close to see them, I only show them that close to make sure people CAN see them and see what I'm talking about. Trust me, they appear in normal use.
It's not a defect, too many do it for it be one. It's simply a different kind of panel I will need to get used to.
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