Can you reverse screen to white on black?

mrmcmanus · 12-14-2010, 01:40 PM

I'm one of those light-sensitive people whose eyes burn after too long on a backlit screen. Often on my Mac I reverse the screen colors when just reading text (Control-Option-Command 8 for those who want to know). Most of the e-reader apps for the iPad and other devices provide this also. Would one of you who owns the Nook Color check and see if this option is provided? Thanks.

Mary

highvista · 12-14-2010, 01:55 PM

You can, sort of. Under the "Text" options when reading a book, you can choose the "Night" theme, which is whitish text on a dark gray background. It's not a true black background such as the Nook software for Android provides, but it's not bad. I hope B&N chooses to add a full-black background in a future release.

boswd · 12-14-2010, 02:34 PM

double that and there is also a Gray background if you still like the black text that works excellent.

SCION · 12-14-2010, 02:35 PM

+1 on the gray background with black text.

mrmcmanus · 12-14-2010, 10:02 PM

Thanks. I'll check it out at a B&N store after the holiday madness is over. Right now it's too cold and the parking lot too crowded.

Mary

jswinden · 12-15-2010, 02:44 PM

There are actually 3 themes you might like (see attached screenshots):

Night
Mocha
Gray

...

SCION · 12-15-2010, 02:56 PM

Quote:

Originally Posted by jswinden

There are actually 3 themes you might like (see attached screenshots):

Night
Mocha
Gray

...

Show off! With the Dan Brown "special illustrated edition" book.

jswinden · 12-15-2010, 03:02 PM

Quote:

Originally Posted by SCION

Show off! With the Dan Brown "special illustrated edition" book.

Yep!!!!

You have to admit, that is one great looking book!

dschoemaker · 12-15-2010, 03:45 PM

Not to be dense, but where do I find those themes? And how do I install them?

I looked at the settings screen and the Screen option doesn't have anything.

I then searched the nook color user guide for the word "themes" and nothing comes up.

Nor would a simple search of this site explain it.

Would someone please point me in the correct direction? Thank you in advance.

zeroh · 12-15-2010, 03:58 PM

For what it's worth, Aldiko allows you to select your own font and bg colors. You can also import the books (epub) on your SD card. The only thing is that you'll need Softkeys to get to the menus. It also does bookmarks, but does not do highlighting. It does have a dictionary and search feature if you want that.

It's not as refined as the default reader and using SoftKeys makes you press more buttons to get it to do things than with the default reader but it's a nice substitute until the new version allows these features.

I use it as my go-to reader and have it set to a gold font on black bg.

bugeyed · 12-15-2010, 06:29 PM

Quote:

Originally Posted by dschoemaker

Not to be dense, but where do I find those themes? And how do I install them?

I looked at the settings screen and the Screen option doesn't have anything.

I then searched the nook color user guide for the word "themes" and nothing comes up.

Nor would a simple search of this site explain it.

Would someone please point me in the correct direction? Thank you in advance.

From a book, tap middle of screen, select text in pop up, tap "normal" to see list.

Cheers,
kev

hank · 10-29-2018, 04:35 PM

Research news: dark text on bright background causes myopia.
==================================
| Why Might Reading Make Myopic? |
| from the everyone-switch-to-the-VT220-theme dept. |
| posted by chromas on Sunday October 28, @17:55 (Science) |
| https://soylentnews.org/article.pl?sid=18/10/28/1449210 |
+----------------------------------------------------------------------------------------------+

[0]upstart writes:

Submitted via IRC for Bytram

[1]Why might reading make myopic?

It is known that myopia develops later when children are more outside
before school and are exposed to bright illumination. What exactly
makes them myopic when they start reading at school is still not
fully understood.

[...] There are cells that respond mostly to brightness in the center
of the receptive fields and darkness in the periphery (ON center
cells), and cells that respond preferentially when the center is dark
and the periphery is bright (OFF center cells). During our normal
daily visual experience, both types are similarly stimulated. But
what happens during reading of text?

Software was developed to quantify the relative stimulus strength for
ON and OFF cells for various visual environments. The software showed
that dark text on bright background stimulates mainly OFF cells
(Figure 1 A), while bright text on dark background stimulates mainly
the ON cells (Figure 1B). It was known from earlier experiments in
chickens and mice that stimulation of ON cells tended to inhibit eye
growth while stimulation of OFF cells tended to increase eye growth.

[...] Using optical coherence tomography (OCT) it is possible to
measure the thickness of tissue layers in the living eye with very
high resolution (micrometer range). The layer behind the retina, the
choroid, is of particular interest since it has earlier been shown in
chickens, various species of monkeys and children that changes in
choroidal thickness can predict future changes in eye growth. When
the choroid thins, the eye typically starts growing, when it
thickens, eye growth is inhibited and no myopia will develop.

Alleman, Wang and Schaeffel asked their subject to read dark text on
white background or bright text on dark background. Already after 30
minutes it was found that the thickness of the choroid either
decreased (when reading standard text) or increased when reading text
with inverted contrast (Figure 2). One would therefore expect that
dark text on bright background would stimulate myopia development and
bright text on dark background would inhibit myopia. Simply inverting
text contrast is therefore strategy to inhibit its development. This
is easily achieved on computer screens and tablets but certainly more
demanding when it comes to printed books.

Reading and Myopia: Contrast Polarity Matters (DOI:
[2]10.1038/s41598-018-28904-x)

------------------------------------------------------------------------

[3]Original Submission

Discuss this story at:
https://soylentnews.org/comments.pl?.../10/28/1449210

Links:
0. https://soylentnews.org/~upstart/
1. http://www.eye-tuebingen.de/the-inst...g-make-myopic/
2. https://doi.org/10.1038/s41598-018-28904-x
3. https://soylentnews.org/submit.pl?op...ub&subid=29782

12-14-2010, 01:40 PM	#1
mrmcmanus Member Posts: 14 Karma: 10 Join Date: Jan 2008 Device: Kindle (various), Nook color	Can you reverse screen to white on black? I'm one of those light-sensitive people whose eyes burn after too long on a backlit screen. Often on my Mac I reverse the screen colors when just reading text (Control-Option-Command 8 for those who want to know). Most of the e-reader apps for the iPad and other devices provide this also. Would one of you who owns the Nook Color check and see if this option is provided? Thanks. Mary

12-15-2010, 02:44 PM	#6
jswinden Nameless Being	There are actually 3 themes you might like (see attached screenshots): Night Mocha Gray ... Attached Thumbnails

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12-14-2010, 01:55 PM	#2
highvista Junior Member Posts: 5 Karma: 54 Join Date: Jan 2010 Location: Tacoma, WA Device: NOOKcolor, Nexus One	You can, sort of. Under the "Text" options when reading a book, you can choose the "Night" theme, which is whitish text on a dark gray background. It's not a true black background such as the Nook software for Android provides, but it's not bad. I hope B&N chooses to add a full-black background in a future release.

12-14-2010, 02:34 PM	#3
boswd Banned Posts: 2,391 Karma: 1001781 Join Date: May 2010 Device: The Nook, Nook color and Droid X	double that and there is also a Gray background if you still like the black text that works excellent.

12-14-2010, 02:35 PM	#4
SCION Séduisant Posts: 4,706 Karma: 2107018 Join Date: Jan 2010 Location: Texas, USA Device: Boox Note Air2+; Kobo Libra2; Kindle Scribe, Oasis3; iPad Mini6	+1 on the gray background with black text.

12-14-2010, 10:02 PM	#5
mrmcmanus Member Posts: 14 Karma: 10 Join Date: Jan 2008 Device: Kindle (various), Nook color	Thanks. I'll check it out at a B&N store after the holiday madness is over. Right now it's too cold and the parking lot too crowded. Mary

12-15-2010, 03:45 PM	#9
dschoemaker Reading Fool Posts: 30 Karma: 10 Join Date: Nov 2010 Location: St. Louis Device: Nook, 2x Nook Color, NST, IPad 1 & 3	Not to be dense, but where do I find those themes? And how do I install them? I looked at the settings screen and the Screen option doesn't have anything. I then searched the nook color user guide for the word "themes" and nothing comes up. Nor would a simple search of this site explain it. Would someone please point me in the correct direction? Thank you in advance.

12-15-2010, 03:58 PM	#10
zeroh Zealot Posts: 121 Karma: 132 Join Date: Dec 2010 Device: nook color	For what it's worth, Aldiko allows you to select your own font and bg colors. You can also import the books (epub) on your SD card. The only thing is that you'll need Softkeys to get to the menus. It also does bookmarks, but does not do highlighting. It does have a dictionary and search feature if you want that. It's not as refined as the default reader and using SoftKeys makes you press more buttons to get it to do things than with the default reader but it's a nice substitute until the new version allows these features. I use it as my go-to reader and have it set to a gold font on black bg.

10-29-2018, 04:35 PM	#12
hank Dinosaur Posts: 107 Karma: 10 Join Date: Sep 2004 Device: Clie TH55, SJ30, VisorEdge, Palm3xe	Research news: dark text on bright background causes myopia. ================================== \| Why Might Reading Make Myopic? \| \| from the everyone-switch-to-the-VT220-theme dept. \| \| posted by chromas on Sunday October 28, @17:55 (Science) \| \| https://soylentnews.org/article.pl?sid=18/10/28/1449210 \| +----------------------------------------------------------------------------------------------+ [0]upstart writes: Submitted via IRC for Bytram [1]Why might reading make myopic? It is known that myopia develops later when children are more outside before school and are exposed to bright illumination. What exactly makes them myopic when they start reading at school is still not fully understood. [...] There are cells that respond mostly to brightness in the center of the receptive fields and darkness in the periphery (ON center cells), and cells that respond preferentially when the center is dark and the periphery is bright (OFF center cells). During our normal daily visual experience, both types are similarly stimulated. But what happens during reading of text? Software was developed to quantify the relative stimulus strength for ON and OFF cells for various visual environments. The software showed that dark text on bright background stimulates mainly OFF cells (Figure 1 A), while bright text on dark background stimulates mainly the ON cells (Figure 1B). It was known from earlier experiments in chickens and mice that stimulation of ON cells tended to inhibit eye growth while stimulation of OFF cells tended to increase eye growth. [...] Using optical coherence tomography (OCT) it is possible to measure the thickness of tissue layers in the living eye with very high resolution (micrometer range). The layer behind the retina, the choroid, is of particular interest since it has earlier been shown in chickens, various species of monkeys and children that changes in choroidal thickness can predict future changes in eye growth. When the choroid thins, the eye typically starts growing, when it thickens, eye growth is inhibited and no myopia will develop. Alleman, Wang and Schaeffel asked their subject to read dark text on white background or bright text on dark background. Already after 30 minutes it was found that the thickness of the choroid either decreased (when reading standard text) or increased when reading text with inverted contrast (Figure 2). One would therefore expect that dark text on bright background would stimulate myopia development and bright text on dark background would inhibit myopia. Simply inverting text contrast is therefore strategy to inhibit its development. This is easily achieved on computer screens and tablets but certainly more demanding when it comes to printed books. Reading and Myopia: Contrast Polarity Matters (DOI: [2]10.1038/s41598-018-28904-x) ------------------------------------------------------------------------ [3]Original Submission Discuss this story at: https://soylentnews.org/comments.pl?.../10/28/1449210 Links: 0. https://soylentnews.org/~upstart/ 1. http://www.eye-tuebingen.de/the-inst...g-make-myopic/ 2. https://doi.org/10.1038/s41598-018-28904-x 3. https://soylentnews.org/submit.pl?op...ub&subid=29782

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