Big Vision Glasses are the hands free solution to magnifying objects 160% larger. When you have something small and detailed, you have to squint, hold it close and you still can't see it. You can try using a magnifying glass, but then you still aren't hands-free. With Big Vision Glasses, you can see what you are working and have both hands free. Big Vision don't require a prescription and can be worn over any prescription glasses, contacts or sunglasses.