- Wider field of view that doesn't change prescription going left to right or up and down. The whole screen in in focus and is clear at once. Also the other screen. So you can change what you're looking at by moving your eyes, not your head.
- Focused about an arm's length away. Not close like reading. And not "Distance". This is the key.
- Can be the upper half of visible-line bifocals, with the lower half a reading prescription.
- None of the shape-distortion that happens with progressive lenses, where straight lines can look curved.
This is especially important as you get older. Half the problem with elders failing to use computers is they can not read the screen. And be sure to keep your computer glasses near the computer, and don't wear them for driving, running, or even hiking. You may need a pair of "distance" glasses for that.
Your prescription may vary. If you're 18 years old with good vision, you don't need any glasses at all.