Calabria Hydrotac Dive OPTX 20/20 Stick On Bifocal Lenses Used for Scuba Mask...

I followed the instructions applying them, and did it two weeks in advance of my dive. I did not like my original position, so a week later I followed the steps to remove and position. A week later on dive day, these were well tested during the dive (unintentionally), as my dive mask itself was not a good fit and I spent the entire dive clearing my mask at 44 ft. Stuck on like glue. Power was true to my bifocal prescription, so function as well as I could have hoped (could read my GoPro settings underwater - when my mask was not flooded, of course). Good value opposed to a prescription mask, considering I only dive twice a year.

What a Waste...i put them on according to the instructions, and they came off almost immediately.....my dive instructor said he would try.....he tried - again exactly how it was instructed - and they washed out & away when i defogged my mask (underwater) within 60 seconds of the dive.....i was originally told not to waste my time & money on those temp type lens and should pay the extra to get them built in the mask originally.......lesson learned.

Worked as expected - now I can read my GoPro icons and dive watch!!

Worked well, stayed on for a week of diving in Bonaire. Unfortunately they fogged easily and I had to keep flooding my mask to clear them.

I was on a dive in October and a fellow farsighted diver recommended these “stick-on” cheaters for my mask to make reading my computer and gauge easier. I had no trouble installing these. I was a bit nervous on my first dive that they'd wash right off, but they stuck tight and have on another 12 dives so far. It's easy to see the small print now. Thanks! The only drawback is my dive guides sometimes think I’ve got water in my mask and can't clear it. Update on 5/24/2025: today while diving one of these came unstuck while diving.

The came scratched right out of the box and don't stay in place. Good luck finding the "concave" side to place against the glass. They don't do much good if they fall out as soon as they get wet. By chance I found one of them floating on the bottom of the pool. I won't be recommending them to my studens.

The good thing is that it works great if you follow the installation instructions correctly. It worked on my Mask and full face mask. Didn't have time to get my prescription mask before a trip and this saved the dive.

save your money, just squint real hard, pay for fancy goggles, I guess. These are absolute trash.