CalabriaHydrotac OPTX 20/20 Stick On BiFocal Reading Lenses Magnifying Adhesive Lens Stick-On Sunglasses Magnifier Reusable

These stick-on-with-water magnifier lenses work! I tried two other brands (stick on dry and using water) and neither one worked - corners began loosening within an hour of application to my glasses. But this brand stays secure to the curve of the glasses and vision magnification is clear.

I have two pairs of these lenses that I bought about two years ago. They work very well and function as they are supposed to. Due to this positive experience, I ordered a new pair of the same lenses. However, to my surprise, they do not stick properly. Although I have followed the process exactly as the information says, and this is not my first time, the corners and edges of the lenses do not stick to the glasses. I assume they changed the material and are now using lower quality. Unfortunately I have to return them although I need them.

I bought a set of these stick on lenses, through I had some initial difficulty, although through some trial and error the lenses adhered to my sunglasses. I use these sunglasses in the pool. They are magnificent, so awesome to be able to read my vitals on my watch while doing exercise. (Over 40 crowd here, lol) Occasionally a bubble will appear where I expect some residual water from being the pool loosens the grip, I just apply a bit of water, press down to push out the bubble and let set awhile to stay put. It is easy enough to pull off and reapply.I ordered another set as I wanted to apply some to my driving sunglasses. The newer lenses, didn't work at all. After exhausting every method I tried earlier and looking online for support, I gave in and contacted support. As an IT professional, I troubleshoot things excessively before I ever reach out for help.Customer service required several steps, photos, etc. Although initially I didn't feel they were responsive, apparently we both had misunderstandings. They replaced the defective lenses, and the new set worked the second try.The lenses to peel up on the edges when drying completely on some glasses. After the night, the lenses lifted slightly along the thickest edge. I found I can just press and hold the lens and sunglasses lens for a minute and they adhere.If you have issues, contact the manufacturer. I suspect the bad set got too old in a warehouse, or too hot during delivery, or sitting in the Amazon Locker. Who knows, the replacement work just as great as my first set.Expect to contact support on a few occasions, I don't think you get the same person each time, so keep the email thread.

The product itself is great my only problem was installing it on my glasses. After fussing with I was able to get it to stay on. Hoping that it stays in place,if there is any problems I will review this again.

They work but the overall size is too small. They need to be twice as wide just for average glasses. Not good except for one-off instances. Immediately fall off when outside.

Love these.. I put them on all my fishing sunglasses. much cheaper that getting prescription .. takes a while to get use to but when you do you won't notice. I can't tie knots without them and I don't want to carry extra pair of cheaters.

I was having problems with StickTite lenses and read some reviews saying Hydrotac was better. Thought they were - got them to adhere well and without bubbles. But when I went to use my sunglasses a day later, they were pulling away from the lenses and had bubbles. With all my practicing from putting on both sets of lenses, my technique had improved so I tried the StickTite ones one more time, and they seem to be doing better, even a week later. So... returning the Hydrotacs. They are a little thicker than the StickTites (neither are not very high quality for clarity, tbh) so if you have lenses that are completely flat, I could see the Hydrotac working in that scenario. Lesson learned: don't buy fancy non-bifocal sunglasses if you need bifocals.

The optics of the lenses seem fine. The issue for me was putting them in the Aviators. They do not place or hold well with this design. I was unable to use them.