# Is dark mode better for your eyes?

I will define Dark and Light mode as follows:

 - Dark mode is reading a bright coloured text on a black(dark) background.
 - Light mode is 'normal' paper like mode with black text on white background.

We were naturally used to have Light mode on any computer application, web page, text document maybe because it resembles reading from a book, or could be other reasons.

# My observations

When I read in dark mode during the day, with lots of light around the screen, I feel less productive, so for speed, light mode seems to be better during the day.

During the night with less light around the screen it fells better in dark mode, too much light being disturbing.

I don't necessarily feel any eyes soreness based on the mode alone, but I like better dark mode and green or yellow text in general.

# Observations of several studies

Research seems to have more insight about the issue. Some points from the article below:
 - Light mode can have flickering and bother the eyes like that
 - Light mode keeps the pupil contracted so easier to focus on detailed text with less effort.
 - Light mode has more blue-light radiation which contributes to eye fatigue.
 - Dark mode keeps the pupil dilated so you need more time to decode the text.
 - Dark mode made you feel more immersed in the text you are reading, probably for the reason above, requiring more time to decode.
 - similarly to photography, for night time pictures you need more time to decode/encode the image 
 
# Battery life and dark mode

There is also the aspect of battery preservation, which has nothing to do with health, that is the only proven fact - dark mode means more battery life, like 1-2 extra hours on a smartphone with OLED screen (mostly all smartphones have OLED type screen these days).

Article mentioned above: 
 https://www.wired.co.uk/article/dark-mode-chrome-android-ios-science
 
# Conclusion 

Is dark mode better ?
 - Not necessarily. For best health benefits I would choose dark mode in low lit rooms, and light mode for bright lit rooms. 
 - Or simply put - don't struggle to read the screen!