I was given advice about eyesight a few years ago. I was told to -- every 20 minutes, stare for 20 seconds at something that is 20 feet away. I am wondering if we can adapt this to the sewing chair. Every 20 minutes, get up and move about the room and do something else for just a bit. Even if we just put something away, or go to the kitchen and get a glass of iced tea.