****** - Verified Buyer
4.5
My first impression of these glasses is that they definitely magnify. This particular pair of glasses is meant for near-field viewing, i.e., close work. For distance viewing (concerts, etc.), you need different glasses.The first application I had for them was in repairing a pair of reading glasses. Using my other pair of reading glasses was not quite good enough to work with the tiny screws. These made the repair possible. They are not super magnifiers; just enough.One thing you need to understand about them is that the range of focus is very small. That is the downside of having a large-aperture, high-magnification lens. You have the same problem with photographic lenses; the larger the aperture, the shorter the depth of field.I didn't find this to be a large problem, though. It just meant that I had to move my head until it was at the correct distance for best focus. If you wish to work a little closer or farther from the job, refocus the lenses for that distance. It's very easy to do.The alternative is to somehow shrink the effective aperture, but this would greatly reduce the amount of light that gets to your eyes. That is not a good idea. More light is definitely better; getting your head to the correct distance is no problem.A very good feature about these is that you can focus the left and right lenses independently of each other. This allows you to correct for differences in your eyes.I have not yet had the opportunity to use these in this way, but I believe they will be very helpful in soldering tiny surface-mount parts when repairing electronic gear or in working with tiny parts to construct a model. I'll try to remember to update my review when I do have to use them for such a task.Yes, they are dorky looking, but they are a godsend for close work.
