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6

There is no display resolution "where the text display is 100% indistinguishable to average human with 20/20 vision from a regular paper book." In fact, display resolution is not the most important factor in producing text as legible as a paper book. Notice I used legible, not indistinguishable. Start by reading Wikipedia on font rasterization. Compare ...


5

I don't know about any for those particular screentypes, but LCD vs E-ink has been researched by Siegenthaler, et al. This study showed that the objective reading behaviour is little different between the two types, but strangely (to me) the subjective preference shifted over time from a small advantage by E-ink to a small advantage by LCD.


5

E-ink displays have to be mounted on a surface. In this case I assume that was done on the glass. This keeps the E-ink nice and flat (good for equal visibility of all pixels) and for extra reflectiveness of ambient light, if the glass is part of a mirror (as it seems to be). The display is actually a thin film transistor array and my guess is that if the ...


4

When ink is printed on paper, the human eye can't really differentiate dots smaller than about one-six-hundredth of an inch. Possibly those of us with the sharpest eyes might distinguish 800 dots in an inch. Thus, before the era of desktop publishing, low-end photo-typesetting equipment was typically 1000 or 1200 dpi. Why not just 800 dpi? Well, first ...


4

Getting older I started to have trouble reading, from my personal experience with a Sony PRS-700 (side lit), SONY PRS-T1 (no internal light) and Book Een Oddesey (front lit), I have to say that the lighting on the BookEen makes all of the differences being able to read comfortably. The BookEen also has a slightly higher resolution, at a similar screen size, ...


4

I would suggest going with an iPad with Retina Display not because: Its a bigger screen At the current time, better resolution than a few other devices BUT because Apple requires their typeset to be adjustable and coded in to accommodate for visually impaired and not a fixed font size. So what this means is if your dad buys a book on iTunes, he tries to ...


3

Size is more important than resolution for most visual impairments. As vision becomes more impaired, the ability to recognize detail is lost, and since text caries information in detail, larger sizes are used to compensate. Higher resolution adds detail, providing a better reading experience for those who can see it. One exception to this advice is people ...


3

Apparently E-ink does age due to various physical processes. There is lost of contrast (greying), but also freezing of some microcapsules to the black state where they are kept too consistently in that state (typical for some parts of device state display which stays on-screen). I am not a specialist, but you can get more (layman level) details on the web, ...


3

The problem with trying any really interesting design elements (like responsiveness) in ebooks is that the main reading systems out there are amazingly primitive by web standards. JavaScript support is more or less confined to iBooks at present, and the only system that uses media queries that I know of is Kindle, and they only support the amzn-mobi and amzn-...


3

The Studies reveal that personal choice is defined by each person and varies considerably. 72 characters is the old schools typewriter format. According to Wikipedia this is often maintained out of tradition. The Effects of Line Length on Reading Online News(Wichita State University, 2005) Summary: This study examined the effects of line length on ...


1

Short answer, you can't see them in the reader pane. You'll find the annotations at: Edit Metadata > Custom medata tab > Annotations (Presuming you created a custom column called 'Annotations', which is the default name suggested by the plugin.)


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AFAIK, Kobos have two reading engines: ADE/RMSDK for ePub2 books and NetFront ACCESS for ePub3 (kepub) books. In addition to checking your book with the IDPF Online Validator, you might want to test your book with an older ADE version, e.g. ADE 2.0.1. If it displays OK with ADE, the reader probably uses an older or incompatible reading app. If it doesn't ...


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This is not exactly an answer which describes a single study (but studies are part of what I searched through). What I did: I searched systematically google using appropriate words "backlit lcd vs e ink epaper eye strain" and looked at all the first results (first google search sites). I extracted all the important text parts of these links and attached ...


1

As I mentioned in your other question, Some where (I can't find it right now), I read that 72 characters per line was best for reading comprehension. When there was less than this the end of line moving your eye to the begging of the next line slowed you down, and when there was more than this following lines become more difficult, because you have to move ...


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