I'm sorry but I have to say it again, since you haven't seen the issue before you obviously have no idea what you are talking about. Seeing the issue is not just about eyeseight as I use glasses and I can see it very well. Some people are more sensitive for such things than others and even though they were able to see it they still can't. I wrote about the other Genius who wanted me to check her phone since she couldn't see the lines before. Once I showed her, she could see them very well aswell. That she still didn't care about them just shows again that some people are more sensitive to these things than others. But the fact that some displays have these lines and some don't is proof that it is not normal. I don't know if these Display are defective or just poor quality but they show a behaviour that is not retina.
I also am not talking about only one phone. As I wrote before I tried several phones (4 were mine, 2 were from the geniuses and about 20 of the public phones in the Apple Store which are there to try out). Besides 2 ALL of these phones had the issue. Some of them had it very strong and some just very subtile but it was visible to me at all the time (not just with the test image). I also noted that it is worse with blue and grey colors. (Just that you don't get me wrong: The issue during normal use is NOT flickering. It's small black lines that seem to move very fastly, a behaviour I also saw on very cheap phones with very cheap LCD Screens. So if you look at your display during normal use and are looking for a flickering like with the test image, that's not what I'm talking about. Again, the flickering just appears during the stress test on the bad screens. Normally it shows as black lines which make the picture look blurry and less sharp and gets the Impression the display has a lower resolution. A good Retina display on the other hand looks like a book print.)
Maybe you got lucky with the phones you had or maybe you just don't see it even though you could (see my example with the Genius). Maybe there are just some of the productions affected so that some regions got all the "defective" phones and some regions didn't get any. The only thing I know is that in my local Apple Store I couldn't find any "public" iPhone without the issue. But of course not every phone worldwide has it, otherwise the one I have right now would have it too. But it's also a fact that the Genius who switched 3 times my phone saw it as well, was very surprised that so many phones were affected, agreed that it is not a normal behaviour and told me to report it internally to Apple since he also thought there were too many phones affected. He wouldn't report it to his bosses if he weren't convinced that it is a widespread real issue! No offense, but this counts much more to me than the opinion of somebody who never saw the issue and therefore just denies it.
Also the test image for sure isn't a optical illusion. First of all with low backlight the flickering appears less and gets worse as brighter the backlight is. 2nd - I repeat myself again - some screens don't flicker at all. You can have 2 different phones side on side, one flickers like hell and the other doesn't at all, so for sure the flickering isn't an optical illusion! I know there exist some Pictures which can cause optical illusions, but this test Image in this case is not. Your explanation just shows again, that you have no idea what you are talking about and therefore you are mixing some things which are not related and get false conclusions out of it.
But the point is that nobody particulary gets bothered by the flickering test image. If it were just that picture, I honestly wouldn't care at all. It's during normal use were the issue - to some people - is very obvisouly visible. On my phone it was so bad it caused me headache and dizziness! The test image is just a fast check to find out if the Display is affected by the issue. But I agree that the people who really can see the issue don't need the test image.
This thread here is to help people who actually have the same issue with their phones and share the experiences, also with AppleCare. Right now I'm not affected by the issue anymore but I write here to share my experience on how Apple reacted, maybe it will help somebody at their Genius Bar meeting. If all the phones you saw and own are perfect - or maybe you just think they are - than that's great for you. Actually I don't want to convince you that your phone is defective, maybe you got a perfect phone, like i did right now. Also if your screen has the lines and you don't see them, I totally agree that you shouldn't look for them. But the point is, it is a real and widespread problem, how widespread it is nobody knows, but for sure many people in this thread actually have this issue with their phone and are looking for help and adivise. Many of them for sure don't earn as much as a pilot and therefore want a premium phone (and not some crappy screen) if they payed a premium price. The thing you do with telling these people that the issue just doesn't exist because you oh so perfect eyes would see it otherwise is just trolling around. Everybody heared your opinion now, everybody knows you can't see the issue, there is no reason why you should continue trolling around in this thread. There are plenty of other threads with other issues which I never experienced on my iPhone, I also don't go there to write to these people that their issue isn't real because my iPhone isn't affected (or I just didn't realize the issue yet).
