I have worn mono-vision for somewhere around 15 years. It seems every time I visit my eye dr there is a little bit of a 'tweak' to be done. I do notice that I have some difficulty when sewing and I plan to discuss that with her the next time I visit for a check-up. I will say...I do have vision insurance and we also put money, yearly, into a FLEX spending plan so getting an extra pair of glasses for some purpose is not generally cost-prohibitive for me. So, I will probably be ending up with a pair to wear when I am sewing or using my laptop.