[Libreoffice-bugs] [Bug 124480] Support Android system theme

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=124480

--- Comment #16 from paulystefan at web.de ---
Created attachment 159262
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science black background against short sightedness

science black background against short sightedness

german scientist made the break throw.

Reading and Myopia: Contrast Polarity Matters

Andrea C. Aleman, Min Wang & Frank Schaeffel

In myopia the eye grows too long, generating poorly focused retinal images when
people try to look at a distance. Myopia is tightly linked to the educational
status and is on the rise worldwide. It is still not clear which kind of visual
experience stimulates eye growth in children and students when they study. We
propose a new and perhaps unexpected reason. Work in animal models has shown
that selective activation of ON or OFF pathways has also selective effects on
eye growth. This is likely to be true also in humans. Using custom-developed
software to process video frames of the visual environment in realtime we
quantified relative ON and OFF stimulus strengths. We found that ON and OFF
inputs were largely balanced in natural environments. However, black text on
white paper heavily overstimulated retinal OFF pathways. Conversely, white text
on black paper overstimulated ON pathways. Using optical coherence tomography
(OCT) in young human subjects, we found that the choroid, the heavily perfused
layer behind the retina in the eye, becomes about 16 μm thinner in only one
hour when subjects read black text on white background but about 10 μm thicker
when they read white text from black background. Studies both in animal models
and in humans have shown that thinner choroids are associated with myopia
development and thicker choroids with myopia inhibition. Therefore, reading
white text from a black screen or tablet may be a way to inhibit myopia, while
conventional black text on white background may stimulate myopia.

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