How to choose the strength for my Nooz?
The Nooz are aimed at people suffering from long-sightedness. If you have an eyesight prescription, long-sightedness will be mentioned as ADD.
Short-sightedness and astygmatism will not be taken into account on the Nooz.
What is long-sightedness?
Long-sightedness is the consequence of the aging of the lens. Imagine the auto-focus of your camera that would be damaged. Your lens works the same. At some point, it hardens and is unable to contract and relax easily enough to offer a good eye focus. This results in difficulties to see from up close.