Recently in Ward Council we discussed a brother who was unable to read the scriptures because he was going blind and could not read braille...
The next morning I was reading scriptures on LDS.org before work and stumbled upon the answer for this problem right there in front of my face.
Very simple process
1. Go to LDS.org and select "sciptures" in the left hand column
2. Select the scriptures you would like to read (BOM, Old Test, New Test, D&C, PofGP)
3. Select the book you would like to read from (1st Nephi, 2nd Nephi, Jacob, Enos, etc...)
4. Select the chapter (chp1, chp2, chp3, etc...)
5. Once the chapter opens to read individual verses an icon will show up on the right hand side of the screen, select the "listen" icon and you can listen to the scriptures being read by both male and female readers
In addition, you can also download the chapter to an MP3 player from the same page

Obviously the visually impaired person would need assistance getting to the page but this is probably the fastest and easiest way for a visually impaired member/ investigator to access the scriptures without having to purchase audio versions.
Thanks! Will