I as well this Article telescope magnifying singular becaufe all those who have purchased this product renderont quickly realize that even if they are laid on our nose is still fixed on one eye at a time, since it is almost impossible to do focus distance on both eyes at the same time ... strength, I just faced one of the two eyes that are removable. If the magnification by 20 is great, I use it to analyze my paintings, frames and paint layer restoration painting, it helps me enormously. Downside: it must actually be closer enormously from the object to see something so that one is often less than half a centimeter away and it is clearly not practical to perform precision work with tools SINCE they are not the place to slide between the lens and the treated object, yet I use very small scalpel and dentist hook but I often do not have instead of handling these glasses with .