It's a good practice to have someplace safe to keep your glasses when you're not wearing them. Most eyewear is fairly delicate, and a sturdy glasses case helps prevent scratches and breaking, so you can confidently set your glasses down when they're not on your face.
A handy eyeglass chain is a fantastic eyewear accessory for those times when you need to move between reading up close and seeing far away. The ends of the chain attach securely to the bows, letting your glasses hang freely around your neck when you're not using them. When you need them again, they're readily available to put back on—no more trying to remember where you left them or having to hunt them down when you need them.