Because presbyopia has advanced, for the time of emergency
On 2016-11-29 19:57:10
It's exactly right to put it in your wallet as a portable one. When thorns stick, they are presbyopic at all, so I do not see them at all, so I think it will be useful in emergencies. I sometimes feel troubled with fine letters, so I think the loupe will become indispensable. It is not as good as presbyopia yet.
Although the structure, portability, magnification and ruler attachment are also good, the appearance of the lens of the essence is cloudy and not clear. It is handy for seeing printed matter and objects with high contrast, but in order to inspect the parts as work, steps of the same color etc can not be seen well. To see the details of tubular irregularities, it becomes a jam and dust collects in this irregularity. I thought it was for emergency confirmation at the site, but it seems that everyday use is the limit if it is this.