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Computer Vision Syndrome

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Re: Computer Vision Syndrome

#151

Post by mcbetz »

giberson wrote: post #44

I use to get headaches every day (the kind that seem to originate behind the bridge of the nose). One day in effort to reduce the ache (a desperation move I didn't know would work out not) I reduced the brightness level in my monitor to the lowest possible setting. It slightly helped me cope with the rest of the day at work, but I forgot to reset the monitor. The next day I didn't get a headache. Turning down the bri…

There is a list of recommended monitors intended for people with migraine over at Reddit and as low brightness is the main criteria, this list can help everyone with CVS.

Here is the post: https://www.reddit.com/r/migraine/comments/53m46d/as_promise... And the list: https://docs.google.com/spreadsheets/d/1etWKGqzZFHd293O5ooKy...

Re: Computer Vision Syndrome

#152

Post by crazy2be »

calebm wrote: post #148
arbuge wrote: post #143

Earlier quoted context omitted.

"From the American Academy of Ophthalmology[1]: "Staring at your computer screen, smartphone or other digital devices for long periods won’t cause permanent eye damage, but your eyes may feel dry and tired."" I always believed this myself but I wonder what kind of research has been done to back it up. Intuitively, staring at a computer screen for 8+ hours a day for year after year would not seem to be a good thing. I…

I'm always suspicious of advice from organizations that would benefit from misinformation (e.g. "Cigarettes are good for you" - the Cigarette Industry or "Looking at screens isn't going to cause you to need more eye doctor services" - some eye doctors).

This is good advice in general, but seems a bit misapplied here- most eye doctors are likely to make more from selling you unnecessary services now then by subtly lying to you in order to damage your eyes :).

Re: Computer Vision Syndrome

#153

Post by abledon »

mamcx wrote: post #100
Globz wrote: post #97

Flux + EyeLeo is the way to go for me, I know my job already damaged my eyes but this helps reduce head aches and dry eyes.

Something like Eyeleo for osx?

found one for linux https://github.com/slgobinath/SafeEyes (written in python with gtk , so maybe use this? http://www.gtk.org/download/macos.php)

Re: Computer Vision Syndrome

#154

Post by maaark »

stephengillie wrote: post #150
giberson wrote: post #44

I use to get headaches every day (the kind that seem to originate behind the bridge of the nose). One day in effort to reduce the ache (a desperation move I didn't know would work out not) I reduced the brightness level in my monitor to the lowest possible setting. It slightly helped me cope with the rest of the day at work, but I forgot to reset the monitor. The next day I didn't get a headache. Turning down the bri…

Often, the minimum brightness is still too bright. An Android app called Screen Filter helps with this on phones - it turns down gamma or another setting - not sure about a PC equivalent.

I prefer Twilight, it has adjustable color temperature, as well as scheduling based on time of day or sunrise/sunset.

Both have paid versions, but Bluelight Filter's constant nagging & promotion of their other apps made the choice easy for me.

Re: Computer Vision Syndrome

#155

Post by eumoria »

giberson wrote: post #44

I use to get headaches every day (the kind that seem to originate behind the bridge of the nose). One day in effort to reduce the ache (a desperation move I didn't know would work out not) I reduced the brightness level in my monitor to the lowest possible setting. It slightly helped me cope with the rest of the day at work, but I forgot to reset the monitor. The next day I didn't get a headache. Turning down the bri…

I've been doing this for years. It was especially a problem back in the CRT days you were basically staring at a light bulb all day.

With the never ending trend of websites and applications being white background black text aside from high contrast modes and/or plug-ins to change color schemes turning down your brightness works well.

My home computer is on night mode with brightness and contrast at the bottom. With the light off or could stand to be even darker!

Re: Computer Vision Syndrome

#156

Post by 72deluxe »

sbierwagen wrote: post #55
dotancohen wrote: post #47

Earlier quoted context omitted.

Turning down the brightness had the opposite effect for me. My monitor at the time "turned down the brightness" by reducing the duty cycle of the backlight. This caused flickering that was imperceptible yet caused much eyestrain. Actually turning up the brightness, moving the monitor as far back as possible, and using yellow-tinted Gunnar lenses have made a huge difference for me. Edit: This is the technique used to…

Basically every monitor with a LED backlight controls brightness by PWM. It only causes problems if the frequency is too low. (Contrast with fluorescent lights: every single fluorescent tube in existance flickers, but only some flicker slowly enough that people can notice. https://www.youtube.com/watch?v=bjyhFyUN_zQ Ditto CRT monitors, back when they were still used. Refresh rate of 60hz is flickery and annoying, ref…

I had a Samsung Galaxy Note 10.1 2014 LTE edition and that used PWM for brightness, along with a ringing noise at certain rates.

Re: Computer Vision Syndrome

#157

Post by mtone »

c0l0 wrote: post #116
mtone wrote: post #98

Earlier quoted context omitted.

According to this recommendation page [0], there are quite a few monitors with "PWM-free (flicker-free) WLED backlight". The list includes many affordable mainstream choices. I heard some monitors may revert to PWM below a certain brightness threshold, but assuming the information on that page is accurate, not getting PWM-free monitor is probably a sub-optimal purchase decision. [0] https://pcmonitors.info/recommenda…

http://geizhals.eu/?cat=monlcd19wide&xf=103_flicker-free#xf_... lists a LOT of displays that are supposed to provide a flicker-free viewing experience, and you can also filter for other technical properties to your heart's content. (Caveat: parts of that site are machine-translated to English - but that doesn't affect the rigor that went into curating the original data).

Looks like a good resource, thanks!

Re: Computer Vision Syndrome

#158

Post by keyboardhitter »

RyanOD wrote: post #59
pmoriarty wrote: post #8

"He recommended I use a hot compress at least once a week for 10 minutes and to look away from the screen in a method called the 20-20-20-20 rule. Every 20 minutes take 20 seconds to look at an object at least 20 feet away and blink 20 times." Is there any evidence that this treatment actually works?

I find that soaking my face for 20-30 seconds in very cold water multiple times each day seems remarkably helpful. Plus it gets me away from my laptop for a few minutes. It's also the last thing I do before I go to bed and the first thing I do when I wake up. The initial thinking was that I could do this to help reduce swelling (tired, puffy eyes). No idea if that works, but it sure is refreshing.

Cold water on the face stimulates the vagus nerve. :)

https://en.wikipedia.org/wiki/Vagus_nerve#Vagus_nerve_stimul...

Re: Computer Vision Syndrome

#159

Post by stephengillie »

maaark wrote: post #154
stephengillie wrote: post #150

Earlier quoted context omitted.

Often, the minimum brightness is still too bright. An Android app called Screen Filter helps with this on phones - it turns down gamma or another setting - not sure about a PC equivalent.

I prefer Twilight, it has adjustable color temperature, as well as scheduling based on time of day or sunrise/sunset. Both have paid versions, but Bluelight Filter's constant nagging & promotion of their other apps made the choice easy for me.

I used Twilight for month, but I found the red tint made my phone hard to read, so I kept disabling it. I still get the same 6-8 hours of sleep as I usually did. I may not be susceptible to the blue light impact on melatonin as I've been using screens from wake to sleep for over a decade.

Re: Computer Vision Syndrome

#160

Post by Grangar »

sbierwagen wrote: post #50
giberson wrote: post #44

I use to get headaches every day (the kind that seem to originate behind the bridge of the nose). One day in effort to reduce the ache (a desperation move I didn't know would work out not) I reduced the brightness level in my monitor to the lowest possible setting. It slightly helped me cope with the rest of the day at work, but I forgot to reset the monitor. The next day I didn't get a headache. Turning down the bri…

A rule of thumb I've heard is that your monitor shouldn't be any brighter than a sheet of white paper held next to it. http://i.imgur.com/5Cwiuif.jpg Mine isn't quite that dim, but it's not nearly as bright as the view out the window behind it.

Wow, good one! I tried that and turned out my monitor was set really high. Let's hope this will be easier on my eyes.
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