Eyestrain, Computers, The 20 -20–20 rule, Light bulb APIs

Wes Turner
2 min readOct 12, 2015

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The 20–20–20 rule:

  • Every 20 minutes, look at something at least 20ft (6.09m) away, for at least like 20 seconds.

Computer glasses (to reduce glare and eyestrain):

  • gaming glasses (e.g. the Gunnar tint and coating (http://www.gunnars.com/faq/) can be found at e.g. Best Buy (where they are known to carry e.g. Gunnar Intercept computer gaming eyewear glasses frames))
  • safety glasses (can often buy in bulk)
  • nosepads (replaceable)
  • nosepads (built-in)
  • glasses measurements (mm)
  • temple measurement
  • vertical/frame height
  • eye_size*2 + bridge size ~= width

Monitor adjustments (to reduce glare and eyestrain):

  • brightness/contrast
  • lighten the blue channel (*)
  • good monitor stands support vertical tilt

Tools that gradually modify monitor settings to match the natural solar cycle:

Browser extensions for modifying brightness, contrast, background, text color; inverting just the CSS colors:

  • [Deluminate, Stylish (userstyles.org), High Contrast] — https://westurner.org/tools/#browser-extensions
  • Disadvantages: (1) These sometimes cause hiccups (easily diagnosable by unchecking the extension(s) and CTRL-R refreshing the current tab) (2) If the browser colors are inverted AND the whole screen is inverted, there’s probably a less contrasty CSS styleset

System High Contrast / Color Inversion:

Dark Window Manager themes:

  • Windows: WindowBlinds, Win7+
  • Ubuntu 10.04+
  • Gnome 3: [dnf install -y] gnome-tweak-tool > “Appearance” > ”Global dark theme”
  • OSX 10.10 Yosemite “Dark Mode”

*[Blue] Light affects sleep (/alertness):

[…] experimental research suggests that an average person reading on a tablet for a couple hours before bed may find that their sleep is delayed by about an hour. — https://justgetflux.com/research.html

  • Complementary color lenses filter the opposite wavelength(s); so lellow-ish lenses block blue light.
  • Probably because the ocean sounds.
  • [I think] red light is easier to accommodate to in the dark.

Features for Multicolor LED [Bluetooth] light bulbs:

  • adjustable (spectrum; millions of colors)
  • gradual wake-up alarmable (n min)
  • gradual dim (~30min)
  • API: Continuous Integration build lamp, AV, HVAC
  • Hub / Hubless (1[+] registered mobile)
  • API: Digital (Voice) Assistant
  • API: RESTful JSON[-LD] LDP URIs
  • API: HTTP WAMP sensor swarm
  • (Open Source) Web Interface
  • Phillips Hue (http://meethue.com/en-us/products/)
  • Misfit Bolt (http://misfit.com/products/bolt)

Font Antialiasing:

  • System font ”smoothing”; LCD
  • System FXAA full-screen Antialiasing
  • GUI toolkit antialiasing configuration
  • [#GIF]

Font Size:

  • System DPI (dots per inch)
  • System base font size (px pixels)
  • [GTK,Qt,Win] Application font size (px)
  • Browser base font size (before e.g. a reset.css) (px,pt,em)
  • Site CSS font styles (px,pt,em)
  • Inc+: CTRL + ScrollUp, CTRL + +
  • Dec-: CTRL + ScrollDown, CTRL + -
  • CTRL + Shift + […]

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