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Old Aug 22, 2008, 01:02 AM   #1
darkspym7
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Am I sensetive to the iPhone screen?

For some reason, my body feels strange whenever I'm using my iPhone (tested in airport mode). For example, my leg will start feeling sore when my iPhone is in my pocket, and I will feel lightheaded while using it. I think it has to be something to do with the screen, but I'm not really sure.

Does anyone know the details of how the screen works, and how it might cause my leg to hurt?
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Old Aug 22, 2008, 01:09 AM   #2
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It's funny you should mention this. Sometimes when my iPhone is in my pocket and i get a call, the muscles in my leg would jerk even before the vibrate or ringer went off. I've always just dismissed as a coincidence but it's starting to happen more frequently. (Though I've never had it in airplane mode...)
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Old Aug 22, 2008, 01:13 AM   #3
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Originally Posted by clancemasterj View Post
It's funny you should mention this. Sometimes when my iPhone is in my pocket and i get a call, the muscles in my leg would jerk even before the vibrate or ringer went off. I've always just dismissed as a coincidence but it's starting to happen more frequently. (Though I've never had it in airplane mode...)
You are experiencing what scientists have termed as a "phantom" tremor and is sort of a learned response that your muscles get after frequent stimulation (via the vibration of your phone). I feel them sometimes as well on my thighs. Just enough for me to think my phone is going off! Weird problem.

As for the OP...that is a peculiar thing occurring. The screen is very bright and I can see how it could cause a seizure with prolonged exposure. I suggest keeping it dimmer so you don't feel the intensity of full brightness.
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Old Aug 22, 2008, 04:03 AM   #4
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You are experiencing what scientists have termed as a "phantom" tremor and is sort of a learned response that your muscles get after frequent stimulation (via the vibration of your phone). I feel them sometimes as well on my thighs. Just enough for me to think my phone is going off! Weird problem.

As for the OP...that is a peculiar thing occurring. The screen is very bright and I can see how it could cause a seizure with prolonged exposure. I suggest keeping it dimmer so you don't feel the intensity of full brightness.
I think it has nothing to do with a phantom anything.
Basically with vibrating phones we've taught our bodies to pay attention to vibrating stuff. This stuff doesn't come as it is in nature, so our body doesn't come built-in from factory to recognise this.

Once we've gotten used to vibrating things - we start feeling all the vibrations around us. Even the fabric of your trousers can vibrate a little bit when it twitches and stretches.

your brain notices the slight vibration and says "look, a phone call" when it fact it's not. I've felt this even when I have no phone on with me.

and about the screen.. maybe you need to wear glasses? It's the only thing that would make sense.
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Old Aug 22, 2008, 04:34 AM   #5
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on regards to the screen issue, even at full brightness the iphone screen should not cause seizures, seizures originating from flashing/flickering lights usually affect people at mid frequencies (usually between 8 and 20Hz) it is known in some cases that higher frequencies (50-60Hz) such as those in TV's, computer monitors etc - usually the old CRT displays can affect a VERY small amount of 'photosensitive' epileptics but being photosensitive is a VERY small amount of epileptic syndromes (it was just picked up by the media years ago and escalated - yes it is good that stringent measures are in place for those who are photosensitive though)
As far as i've read there have not been any/many cases related to people having a seizure whilst using the iphone.

Sorry slightly off on a tangent there just thought i'd show a pearl of wisdom as i'm an epilepsy specialist.

darkspym7 how long have you had your iphone? did you have the 2g version before this if so did it make you feel like this? Seriously i would speak with a doctor about your problem, explain that you think it may be related to your phone but keep a list of when you feel unwell and what you are doing, i think this is probably co-incidental but it may not be!

Hope everything goes well and you can use your iphone whenever you like!
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Old Aug 22, 2008, 05:40 AM   #6
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Yep, I always get good good good vibrations whenever I use a iPhone that's ringing me. Chalk it up to awesome karma, baby.
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Old Aug 22, 2008, 07:03 AM   #7
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Hahaha how funny, people always make fun of me when I think my phone is ringing. I guess I'm not the only one.

When sometimes just walking or sitting still, I feel a vibrate and grab my phone only to see it not ringing. Or even when I thought it was going off, reached in my pocket and... no phone. It was on the table lol Looks quite stupid sometimes.
Or sometimes I hear the SMS text noise, but in fact nothing rings.

Guess that's just human brain getting used to reacting quickly to those sounds and feelings.
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Old Aug 22, 2008, 07:51 AM   #8
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Quote:
Originally Posted by darkspym7 View Post
For some reason, my body feels strange whenever I'm using my iPhone (tested in airport mode). For example, my leg will start feeling sore when my iPhone is in my pocket, and I will feel lightheaded while using it. I think it has to be something to do with the screen, but I'm not really sure.

Does anyone know the details of how the screen works, and how it might cause my leg to hurt?
Feeling strange and lightheaded when using your iPhone? Sounds to me like you're in LOVE!

Once the honeymoon period is over you'll soon start to get irritated by the niggles your loved one has, such as dropping calls and crashing out of apps.

Before you know it you'll be bored and listless in your relationship and will start looking at HTC Touch Diamonds on the internet and visiting seedy phone shops late at night.
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Old Aug 22, 2008, 07:59 AM   #9
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Feeling strange and lightheaded when using your iPhone? Sounds to me like you're in LOVE!

Once the honeymoon period is over you'll soon start to get irritated by the niggles your loved one has, such as dropping calls and crashing out of apps.

Before you know it you'll be bored and listless in your relationship and will start looking at HTC Touch Diamonds on the internet and visiting seedy phone shops late at night.
divorced?
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Old Aug 22, 2008, 12:28 PM   #10
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Originally Posted by jmmo20 View Post
I think it has nothing to do with a phantom anything.
Basically with vibrating phones we've taught our bodies to pay attention to vibrating stuff. This stuff doesn't come as it is in nature, so our body doesn't come built-in from factory to recognise this.
Yeah, it definitely could be that as well. I refer you to this article for more information on what I was referring to:

Quote:
"When we learn to respond to a cellphone, we're setting perceptual filters so that we can pick out that (ring or vibration), even under noisy conditions," Lleras says. "As the filter is created, it is imperfect, and false alarms will occur. Random noise is interpreted as a real signal, when in fact, it isn't."

Phantom cellphone vibrations also can be explained by neuroplasticity the brain's ability to form new connections in response to changes in the environment.

When cellphone users regularly experience sensations, such as vibrating, their brains become wired to those sensations, Janata says.

"Neurological connections that have been used or formed by the sensation of vibrating are easily activated," he says. "They're over-solidified, and similar sensations are incorporated into that template. They become a habit of the brain."
Quote:
Originally Posted by Ingster View Post
As far as i've read there have not been any/many cases related to people having a seizure whilst using the iphone.

Sorry slightly off on a tangent there just thought i'd show a pearl of wisdom as i'm an epilepsy specialist.
Yeah I didn't think it was epilepsy either but that was the first thing to come to mind with bright screens and such...
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Old Aug 22, 2008, 12:31 PM   #11
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It has made my eyes uneasy but then I have just gotten used to the iPhone.

I'd think it's worth having a medical though to be safe.
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Old Jul 25, 2012, 05:03 AM   #12
Barbi503
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.

----------

Quote:
Originally Posted by Ingster View Post
on regards to the screen issue, even at full brightness the iphone screen should not cause seizures, seizures originating from flashing/flickering lights usually affect people at mid frequencies (usually between 8 and 20Hz) it is known in some cases that higher frequencies (50-60Hz) such as those in TV's, computer monitors etc - usually the old CRT displays can affect a VERY small amount of 'photosensitive' epileptics but being photosensitive is a VERY small amount of epileptic syndromes (it was just picked up by the media years ago and escalated - yes it is good that stringent measures are in place for those who are photosensitive though)
As far as i've read there have not been any/many cases related to people having a seizure whilst using the iphone.

Sorry slightly off on a tangent there just thought i'd show a pearl of wisdom as i'm an epilepsy specialist.

darkspym7 how long have you had your iphone? did you have the 2g version before this if so did it make you feel like this? Seriously i would speak with a doctor about your problem, explain that you think it may be related to your phone but keep a list of when you feel unwell and what you are doing, i think this is probably co-incidental but it may not be!

Hope everything goes well and you can use your iphone whenever you like!



Well I'm epileptic and lately when I stay on my phone for a long time (like past 10 mins atleast) my body will jerk very strongly and get real jittery like if it were about to go into seizure. It scares the crap outta me and makes me get off the phone. So I don't think u can say that an iPhone screen doesn't cause seizures cause I think it's very possible.
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Old Feb 3, 2013, 12:23 AM   #13
Dhall0773
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I just got the iPhone 5 like a week or two ago. I am photosensitive and I have petit mal seizures or whatever they call them now days.. My phone makes me so light headed when I talk on it that sometimes I can't even hold a conversation. The screen gives me headaches. And sends me into absence seizures. I don't know if the phone is defective or if apple products are just not for me, but the phone charger that came with it overheats too. And the phone itself even gets pretty warm to touch when charged on the replacement cord...
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Old Feb 3, 2013, 12:27 AM   #14
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Quote:
Originally Posted by darkspym7 View Post
For some reason, my body feels strange whenever I'm using my iPhone (tested in airport mode). For example, my leg will start feeling sore when my iPhone is in my pocket, and I will feel lightheaded while using it. I think it has to be something to do with the screen, but I'm not really sure.

Does anyone know the details of how the screen works, and how it might cause my leg to hurt?
Your not using your iPhone at full brightness, are you?
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Old Feb 3, 2013, 01:56 AM   #15
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Somebody forward this thread to Dr. House
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Old Feb 3, 2013, 07:45 PM   #16
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Originally Posted by mrsir2009 View Post
Your not using your iPhone at full brightness, are you?
You're asking someone who posted in 2008.
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Old Feb 3, 2013, 08:32 PM   #17
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Originally Posted by BrownManUPS View Post
Yeah, it definitely could be that as well. I refer you to this article for more information on what I was referring to:





Yeah I didn't think it was epilepsy either but that was the first thing to come to mind with bright screens and such...
Thank you, this is really interesting. How complex is the human brain...
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Old Feb 3, 2013, 09:39 PM   #18
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Sorry, I just laughed out loud...
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Old Feb 3, 2013, 10:12 PM   #19
mrsir2009
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You're asking someone who posted in 2008.
Well I don’t pay attention to the date of every thread I post in, as usually when threads are up the top they’re recent
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Old Feb 3, 2013, 11:55 PM   #20
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Zombie threads are usually reanimated by newbies or spammers.
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Old Feb 4, 2013, 12:21 AM   #21
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Don't know about the iphone in your pocket thing.

But as far as using it, I got an iphone replacement to my original and I used it for one week. If I used it for more than a couple minutes, I started to get nauseous.

I ended up finding out that the particular iphone 5 I had had an interlacing problem, and I'm very sensitive to this.

I also noticed some other issues with the screen that prompted me to google it, and sure enough it's a common problem.

I went and got another replacement and this one had a screen that didn't exhibit the behavior. No more nausea.

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OMG I just saw this was an ancient thread
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Old Feb 4, 2013, 12:33 AM   #22
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Don't know about the iphone in your pocket thing.

But as far as using it, I got an iphone replacement to my original and I used it for one week. If I used it for more than a couple minutes, I started to get nauseous.

I ended up finding out that the particular iphone 5 I had had an interlacing problem, and I'm very sensitive to this.

I also noticed some other issues with the screen that prompted me to google it, and sure enough it's a common problem.

I went and got another replacement and this one had a screen that didn't exhibit the behavior. No more nausea.

----------

OMG I just saw this was an ancient thread
I believe the phenomenon your referring to is called dot crawl/pixel walk. It occurs on lcd's that have an improperly set common-electrode voltage. Unfortunately its very common in lcd's especially recently. I am also susceptible to it. My macbook has it, but my hp dv7 does not. My friends ipad mini had it pretty severely. Gave me a really bad headache. It seems to vary even on the same model of laptop how much it has it. Manufacturers have seemed to care less about setting this voltage properly in more recent years. Thankfully superamoled screens do not exhibit this behavior.

Heres two pages that explain more in depth and include test images.


http://www.lagom.nl/lcd-test/inversion.php

http://www.techmind.org/lcd/dotcrawl.html
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