I bought the 4x version some time ago, and just purchased the 5x version. I have been surprised at how much better these glasses are than trying to manipulate a magnifying glass. When you need to see something tiny, and it helps to have both hands free, these are a must. For example, threading a needle, or trying to remove a small splinter with tweezers.The lenses seem to be good quality, and the frames are sturdy. I find them quite comfortable, but your mileage may vary.The glasses have a numbeSee full review