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patent10021

macrumors 68040
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Apr 23, 2004
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I've been avoiding buying another device because I'm actually trying to reduce iPhone/iPad usage for my eye health. Unfortunately, right now, that's not so realistic while I go through my graduate programme.

I'll be using Notes app, Youtube and Apple Books for EPUB pretty much all day. Should I get an iPad with the highest refresh rate? There's debate on whether or not it even makes a difference over 60Hz.

I'm really dreading longer hours on another mobile device.

Is a bigger iPad better?
 
I noticed I would get eyestrain from certain Apple products with poor PWM performance. Ideally if you're having problems with your eyes I would opt for a device with either no PWM in the screen or a very high flicker rate. A good example would be the 2018 iPad Pro which has no flicker/PWM.

You can test this on devices you already own now by using the slo-mo recording feature on iPhones/iPads and adjusting the brightness on screen.
 
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Thanks. I wish there was a list of devices with no flicker or devices with proper PWM. Apparently iPhone 12's are trash and even iPhone 13 seems to still have flicker. Seems iPhone 11 or 2020SE is best.

I have no idea about newer iPads.
 
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And remember that not everyone is bothered by PWM, though if you have eyestrain looking at a LCD panel, that could definitely be the problem. I don't have any eyestrain looking at any LCD panel, but I did with the old CRT's. It's a lot like refresh orientation, you either are bothered by it or not, and it has something to do with vision/nerve impulse speed. Even a slight difference in the way our bodies work can make a huge difference in vision/perception.
 
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I have worked in Education sector in IT supporting Ap[ple product. I closely aligned myself to educators and the head office support staff for the educators. Their basic concept was the bigger the screen for someone with vision issues the better. So my answer would be the 12.9" Pro models.
 
I own an iPad pro 2017 10.5" which seems no PWM issue to my eyes, not sure about the latest iPad pro (with OLED?). I was used to upgrade my iPad every 2 or 2.5 years, but I have to hold until one "eye-friendly" iPad pro available.

I have two kindles incl. Oasis, but still prefer iPad in my backpack if I have to carry one...
 
There is no ipad with oled. Only ipd with pwm is ipad pro 13 (2021), but with such high freq that it is almost ure you wont care
 
There is no ipad with oled. Only ipd with pwm is ipad pro 13 (2021), but with such high freq that it is almost ure you wont care

2018 Pro 11 doesn't have PWM but 2020 Pro 11 has PWM but at higher frequencies than OLED.


 
2018 Pro 11 doesn't have PWM but 2020 Pro 11 has PWM but at higher frequencies than OLED.


My bad, i checked 2021 11inch pro and that is pwm free so I thought 2020 is as well…
 
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