I wear soft (monthly) contact lenses for as long and often as it takes for them to fall apart. I pay meticulous attention to keep them clean and sterile and take the risk of breaking all the important contact lens rules. I only wear them for surfing and they get a lot of time in the cleaning/sterilising solution between surf sessions. However, don't do what I do, because it can cause nasty infections leading to the loss of your eyesight or death
My optometrist was able to order free trial lenses for me for several years (infrequent use) before I thought I better buy some. The lenses on offer have improved massively in the last few years, being much closer to my exact requirements. Before that I had to wear lenses that were only approximately right for me. I did not want to risk loosing expensive custom-made lenses. Now disposable custom made lenses are available that get quite close to what I need. It's a bit like ordering a custom surfboard which then gets popped out by a machine in multiples of 6, with different planshape, rocker and rails on each side of the board.
(Size/shape/spherical/cylinder/axis of lenses can be made to order for each eye. Some companies even make free trial lenses like that.)
After surfing, I put the lenses back in the cleaning solution, then replace the solution once or twice before using them again. I only use them for surfing, because spectacles give me better vision when not in the water. If I have not surfed in a while, then I replace the storage solution with fresh solution for several hours before using the lenses.
The biggest problem is the combination of contact lenses and sunscreen. It makes my eyes burn and I have had to take the lenses out and leave the water on some occasions. The contacts seem to stop the sunscreen from being washed out of the eye again if it gets in.
Now that I wear disposable lenses that are usually over-due for replacement, I open my eyes under water, but I never lost a lens due to it. Sometimes I even have to deliberately put my head under water with eyes open, then look around a bit (roll my eyes) to wet and loosen the lenses. This (hopefully) allows them to rotate into their proper position/orientation again (important for cylindrical lenses).
I'm thinking about combining contact lenses and my old Gath helmet. I last used the helmet years ago, before semi-disposable contact lenses for my particular requirements became available. I figure that the helmet will make it unnecessary to use any sunscreen above the eyes, therefore stopping the burning.
I have tried many different forms of strap-on glasses and goggles before, but they are all a pain. Fogging up, drops sticking to the front, hurting you in a wipe-out or getting ripped off and lost.