I also use stronger reading glasses when I sew. Cheap reading glasses from the drugstore work fine. Remember your glasses for reading are based on the length from your eyes to your book. Your sewing machine is much closer to your eyes and you may need stronger glasses for the shorter distance. I have separate glasses for reading, for my computer, for my sewing machine, for driving, etc, all different strengths. Drives my husband nuts trying to find whichever pair of glasses I have lost! Measure the distance from your eyes to the needle then go to the drugstore and try on pairs of different strengths, reading the chart there at the same length you have measured.