Magna-flip Clip on Flip up Magnifiers, Converts Distance Glasses and Into Reading and Computer Glasses. +2.00 Diopter

I bought these lenses in January 2018. It is now August 2018 & I need to replace them. So I got about 7 months of HEAVY use for just under $13 -- not bad at all, but not quite great.The glasses are reasonably scratch resistant. Fairly light in weight so... comfortable to use. I flip them up & down a lot -- down for reading, up for conversations & other activities. The spring holding the lens when flipped up is still working just fine. However, the spring that holds the lens in place when it is flipped down, so as to be against my glasses for reading purposes -- that spring has lost some power. As a result, the lenses "sag" away from my glasses, just a quarter inch or so, when I tilt my head to read or do cloose work. It's a minor annoyance but spoils my concentration at times. So I just bought a replacent pair of lenses.The lenses themselves are great. Flip lenses are a good idea for people who, like me, make frequent shifts between close work & other activities. With lighter use these lenses would surely last longer. Even so... 7 months of heavy use for under $13 -- I can live with that.Aloha to all from Hawaii.

good quality, no distortion, perfect behavior

In the last 2 years I've had increasing problems seeing small print. I really do not like bifocals and was resigned to wearing one pair of glasses for distance and the other for reading. However, the lenses on my glasses are very expensive.I just slip these on my glasses to read and just flip them up to see distance. I find it particularly helpful when reading in the living room while needing to keep an eye on the kids.It is astonishing how much clearer (and magnified) things are when wearing this.

Sturdy with a strong clasp.

My wife loves them. She wears glasses, but even with bifocals, close work required her to put a pair of drugstore magnifying glasses over her regular glasses- very awkward. Why four stars? Even the "small" size is large for many women's glasses, and clipping them onto her glasses is cumbersome. I have not seen these anywhere but Amazon. Much better solution than glasses on top of glasses. If you do not know what "powere" you need, go to a drugstore and try the different strengths to find one that works for you.

I wasn't sure about ordering these to use on my very expensive glasses. I was afraid that I might scratch my lenses but they absolutely do not! There is a spring clip that you press open and position theses glasses over your regular lenses. All the parts that touch your lenses are covered in plastic or rubber. They stay in place and don't slip around. It is very easy to flip the lenses up when you don't need them. I am using them to read music on a music stand. My regular glasses are progressive bi-focals but the bi-focal is positioned at the bottom of the lenses and I can't use them unless it point my nose up to the ceiling. These clip-ons provide the additional magnification just where I need it. I have also used them for doing detailed craft, sewing and bead work.

I really like them. My only complaint is that I can't seem to keep them clean for sharper image.

I like these as they transform the upper range of my progressive glasses to a close up range without having to tilt my neck back when I do close up work that is up high or overhead. I only wish they were a bit lighter.