I wonder why I hadn't thought of buying such glasses for so many years (I didn't even know that there are glasses for myopia). Finally, I can see underwater!!! For those who have a significant degree of myopia like me and don't wear contact lenses, they are ideal!!! They don't easily get blurry, they fit well without letting water in! I don't know about their durability over time because I've only had them for 10 days, but I will come back with a review if something goes wrong in a short period of time! I don't know if the cheaper ones, around 10 euros, are equally good, I chose to take the risk and pay a little more with the mindset of "you get what you pay for" and for now, I don't regret it!!!