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Try f.lux?  It adjusts the color of your monitor depending on the time of
day.  It will affect color work, though, but it does have hotkeys to turn
it off.  http://justgetflux.com/


On Fri, Jan 31, 2014 at 6:24 PM, janlan <[log in to unmask]> wrote:

> Hello,
>
> Has anyone had a laptop or seen laptops that hurt their eyes?  I'm trying
> to find a new laptop and I am having trouble replacing my 3 yr old HP
> Elitebook, which HP gave me a full refund on, due to it being a lemon.  To
> get a new HP Elitebook and a low resolution screen, I will sacrifice an i7
> and most likely a discrete graphics card.
>
> When I look at MacBook Pros and now Lenovo Thinkpads the screens hurt my
> eyes after a short period of time.  There are long forums of people
> complaining about the MacBook Pros hurting their eyes, even with the Retina
> display.
>
> I'm trying to figure out what aspect of the screen specifications hurt my
> eyes.  If I knew this it might be easier to find an appropriate laptop.  I
> think screens with a lower pulse width modulation, (PWM) may be harder on
> the eyes.  It sounds like Apple uses very strong LED's, so they have to
> reduce their brightness by flashing them on and off.  The pre- Retina
> display MacBook Pros were harder on my eyes, than the Retina Display models.
>
> I would guess that I'm sensitive to the PWM, (similar to fluorescent
> lights).  A PC, with integrated Intel graphics has an option, to save
> battery life, which decreases the frequency of flashes, in the power save
> mode.  This can be disabled if one does not have a discrete graphics card.
>  Someone said some gaming computers, like Asus may have a 120 hz response
> time. Does anyone know if this is similar to the PWM?
>
> It may be PWM is the problem, or it could be that newer screens are LED
> based, with passive reflex technology rather than TFT active matrix
> technology (which I think is related to the PWM), or it maybe that newer
> displays have a higher brightness/nit, contrast ratio.  An Acer Aspire does
> not hurt my eyes as much, as it is a glossy 1366x768 low resolution TFT
> active matrix screen.
>
> Has anyone found a certain style laptop that is easier on the eyes and
> still retains good color values?
>
> Thank you,
> Jan
>
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