Pause Me – Apply the 20-20-20 rule to prevent eyestrain while working

If you're using Xscreensaver instead of xlock:

    #!/usr/bin/env bash
    set -e
    while true; do
        sleep 20m
        xscreensaver-command -activate
        sleep 20s
        xscreensaver-command -deactivate
    done

I accidentally did something similar quite a few years ago when I stupidly set up a grep to run updatedb every two hours. There was several months lag as well between when I did that and my computer started locking up every two hours for a few minutes. And embarrassingly, it took me a week or two to put it together.

Explanation? DOes it just lock the screen for 20 secs?

The only problem with f.lux is that it's so seamless it's like it's not running, so occasionally I'll turn it off accidentally and it feels like looking into the heart of a supernova.

My eye strain ended permanently about 4 years ago, the day I installed f.lux. My eyes have never once felt strained at night after that day. Truly a miracle program.

I recommend f.lux too. The only problems I've encountered with it are:

- doesn't take into account wacky sun hours in nordic countries during winter, I get around this by setting my location to be somewhere else

- isn't able to automatically detect when I'm playing a fullscreen videogame, when I would prefer it automatically switch off

Is anyhthing known about the internals of it, i.e. what code does it use? Something like SetDeviceGammaRamp on Windows? Or does it talk directly to the video card driver (if that is even possible in a generic way)? Or the monitor? Does it still work reasonably if I already have set my display to low brightness etc?

edit also wondering: it cannot know if I'm sitting in a completely dark room, a sunlit room or a room at night with fluorescent lighting. Don't such factors change what the ideal color would be? (not that I am constantly adjusting my display now according to the amount of clouds outside, just wondering what it does exactly. There's like no info whatsoever?)

There's also redshift, an open source version that works on linux.

Surprised when I find friends who haven't installed it (or an alternative) yet

And here, I am ridiculed for using Flux. Some marketing people just hate it. One co-worker has me disabling it anytime he has to look at my monitor (not much, but still an annoyance!)

Even CyanogenMod has something like flux and it helps.

Another alternative is Melatonin[1] which tries to imitate f.lux for chrome(book) users.

[1] https://giraj.github.io/melatonin

Do you mean a LCD display with fluorescent tube as light source, instead of an LCD display with an LED as light source?

Your MacBookPro with Retina display uses an LCD with LED light source too - it's just an LCD panel with IPS technology instead of the TN technology (common in cheaper desktop monitor panels).

Your MBP contains what is commonly called an "LED" display - an LCD with LED backlight.

Ah. Thanks castell, geococcyxc, emsy. I didn't know what Retina display uses. I guess my experience is simply due to cheaper TN panels.

I hate HN lately. Now you can get downvoted for your personal experience. Take my upvote.

I wasn't able to find any conclusive evidence, but there are studies that have shown that taking breaks and changing the distance of what you're focusing on (things that the 20-20-20 rule suggests to do) can help improve eye strain. One study: http://www.ajronline.org/doi/pdf/10.2214/ajr.184.2.01840681

From practical experience, the break in the flow is minimal: you lose your immediate context, not the entire structure you've built up in your mind. And the loss of context isn't always bad, as it's helped me figure out small problems or identify potential problems which I normally miss from being constantly heads down.

I've been trying this concept for a few days and it's not that bad. It just forces me to stop typing and looking at my screen, not stop thinking or working on my problem, so it doesn't really affect my flow or concentration. It's actually kind of helpful to have to stop and think about what I'm doing.

I actually use a similar thing - I run a script that locks the screen every 30 minutes and take a short break. At first it can be a bit annoying, but it does reduce eye strain and improves overall well-being.

I use RSIGuard (Mac), not for eye strain but for muscle pain in my forearms. I've set it up to give micro breaks (10 seconds) every 5 minutes and exercise breaks (4 minutes) every 45 minutes. It does break the flow, which is a bit of a pain, but not as much of a pain as I had in my arms :-)

I've written more about how I got rid of my RSI here: http://henrikwarne.com/2012/02/18/how-i-beat-rsi/

Having pain in your wrists and fingers so you can't type, and not having the ability to focus on the screen, those things are very annoying for developers.

I have RSI and use Workrave to force me to take a 30 second break (where I stand up and stretch etc usually) every 10 minutes and a 5 minute break every hour of typing (which, since software development is a lot of discussing and thinking as well as just typing, doesn't usually mean it comes up every hour).

You get used to it, and I honestly don't think it disrupts any kind of flow. That cartoon is about disrupting you with some other information, not with a break.

Better POP flow now than POP eyes later.

Thanks for the feedback. Multi-Screen support has been added.

http://www.dejal.com/timeout/ looks similar

And for Linux(Mint/Ubuntu)?