I've never had glasses (I apologize to all those that wake up in the morning and can't read the clock), but I had to break down when I realized last week that I am threading the sewing machine by feel and that I can't rip out stitches without ripping fabric. The eye doctor suggested that it is caused by my eyes being 40 years old (which I don't understand because my body and mind have not degraded at all in their 40 years). So yesterday I picked up my new reading glasses and am now figuring out when to look over or through the lenses, when to move my head or just my eyes and where to keep the glasses when I'm not looking through them. The maintenance has begun. However, I have ripped out two seams with them and I am amazed- the thread really does look different than the fabric.