Review on Hydrotac Stick-on Bifocal Reading Glasses by OPTX 20/20 by Jim Linquist

So far I'm very happy with it; allowed me to dive without having to deal with contact lenses or having to buy a very expensive prescription snorkel/scuba mask. Now I can read my watch and divers with no problems. I've read some reviews about them not sticking, falling off etc but that's not my experience. If you apply and position them "wet" as instructed in the instructions and then let them dry for "24 hours" they will hydrostatically adhere and even if your scuba mask (sunglasses or whatever you use) later gets wet they will stay on the spot. I took off my entire scuba mask while descending 30ft during a dive to practice emergency procedures and they stayed on as expected. Recommend it to everyone, just follow the installation instructions.