If I want to work on my desktop, the work is much further away and so my #10 lens doesn't focus at the right spot for this type of work. In this situation I generally use my #5 which magnifies 2.5 times and focuses at 8" or 20cm. This works for me as my desk is fairly high and I can lower my chair if it isn't quite right. You may want to go to a #4 or #3 which give less magnification but allows you to work further away. Your own height, particularly your sitting height, and desk height are big factors for this working situation. The trade-off with more magnification is you have to be closer to the work and finding the optimal magnification and focus distance can take a bit of time and effort. Raising the height of your work surface can be a solution if you need more magnification. For a more comfortable position you may need a less detailed view.