Eyejusters let you change lens focus to suit what you're doing. It's like having lots of pairs of reading glasses in one.
If you wear reading glasses, you probably already know the frustration of having multiple pairs with different powers for different tasks. One for computer use, one for reading, one for doing close hobby work.
The lenses in Eyejusters can be adjusted to change power at any time. This means you can quickly change the focusing distance in each eye whenever you change task. It's like having multiple pairs of reading glasses, all in one.
Each eye can be adjusted independently, and Eyejusters cover a generous close-up range of +0.5 to +4.0D.