Clawdia, for the same font size I get at least 3x as many words/page on my DXG compared to my K3. Even if I go to a slightly larger font size on my DXG I still get at least 2x as many.
Sorry your eysight is not too good and I can see where sans serif's much bolder font (much too bold for me btw) could be very useful for your eye condition. In your case I suggest you try to use some of the available Kindle K2. DXG font mods. Some of these require hacking your DXG and a couple do not. Have a look at this link, it might help you;
https://www.mobileread.com/forums/sho...d.php?t=128704
I'm sure that if you can get a sans serif font on your DXG you will be VERY happy, lol!
Cheers,
Tom