Calabria Hydrotac Dive OPTX 20/20 Stick On Bifocal Lenses Used for Scuba Masks/Diving Goggles Magnifying Bi-Focal Stickers

I went to Belize on a dive trip - my first in a few years. Since my eyesight has gotten progressively worse over the past few years, I realized that I may not be able to read my gauges. I ordered this product hoping it would help and it absolutely did. I only used it on one side of my mask, as my other eye has a large astigmatism that can't be easily corrected with an inexpensive product like this. Finding the concave side of the lens was a bit tricky (hard to feel which side was which), but I must have done OK because the lenses stayed firmly attached throughout several days of snorkeling and two days of diving. Would buy again.

Installed according to the directions provided. I let lenses set for 3 days before using (instructions recommended at least 24 hours.) They appeared to have mounted securely to my dive mask, but with first rinse, they floated out and I to the river I was planning on diving. Still had to make the dives, but could see my gauges clearly. I tried to request a replacement pair, but Amazon/seller states I need to return the defective/lost pair. Since they're somewhere in the river, looks like I am S.O.L. for a replacement pair of lenses or a refund. I'm looking elsewhere, so I appear to have no choice.

I'm new to scuba and needed something so I could read my pressure gauge and dive computer. I wear glasses with progressive lenses and found that under water, I could see things beyond arms length pretty well due to the magnification the water provides, but I couldn't read my gauges. I didn't want to commit to buying a prescription mask yet.I bought the 3.0x stick-ons and:- washed the inside of my mask with oil free soap - I used plain dish soap as it removes grease and oils- thoroughly rinsed out all the soapy water- put warm water in the mask and dumped it out leaving the glass wet- wet the stick-ons and positioned them in the mask. they slide around easily so I had to be careful as I pressed them down to squeeze out excess water from between the stick-on and the glass- I then dabbed the inside with a towel to remove excess water and let the mask sit for 3 days before divingThe stick-on lenses stayed in place and I was able to read my gauges and computer. Have to remember that readers are for things that are less than arms length away. They're not for distance. Using primarily my left eye, I took my time to hold the gauge or computer in line with the reading lens.I have since moved the lenses to a different mask and have completed another dive without issue.

These seemed like they would work great. I have a hard time seeing up close and need readers day to day. I got these on and tried them out in the pool and they seemed to work great. I did have a hard time getting them to stay on however. After feeling confident they were on I took them diving. They didn't last past the first dive. Maybe I didn't get them on right but didn't last long enough.

UPDATE: Some reviewers have said that these lenses did not stay put. I've now had 12 dives with them, they're still firmly in place after multiple mask washes, multiple (and intentional) mask floodings to see if I'd lose one or both. Neither lens has moved. It may be that after installing them as directed I waited several weeks to give them time to stick, but I'm not sure. My only gripe is that these are on the smallish size so I have to tilt my head way back, or raise my gauges up quite high, to get things in focus.ORIGINAL REVIEW: I have crummy eyesight up close, and now that I'm returning to SCUBA I needed diopters to see my gauges and dive computer. I didn't want to pay for prescription lenses, at least not yet, so I tried these. The instructions are clear. These are supposed to be applied with the concave side down, but it was a bit hard to tell which side that was because the curvature is so slight.I put these on as directed after cleaning the inside of the mask. It was fairly easy to "milk" the water from under the diopters but no matter how hard I tried a tiny corner of one of the lenses would not stick down. Hope that's not going to cause problems down the line. I've let these sit to dry for several weeks after putting them on, a dive trip is coming in a few weeks, and if one or both of these fall off I'll be back with an update and modify my overall rating accordingly.

Worked great for my husband who wears glasses. He used them scalloping. They were easy to fit on his mask and stayed in place while snorkeling.

Couldn't see out of my mask. Purchased a mask with my perscription.

faciles cumplen perfectamente debe esperar 24hrs de colocada para ppoder ser usadas