I have signed up for a couple of excursions, Sting Ray City Combo and Swim with the Dolphin. I wear glasses and normal snorkel mask does not offer enough magnification. Do the excursions provide stronger lens mask ?
Some do some don't, it usually depends on the size of the operation. Places that get lots of people through the excursion may offer some, but I would not count on it. If you signed up through the ship, you can ask when you get on board. The ships usually stock a few and you might be able to rent or resrve it for the week and take it with you.
LisaK know what she is talking about. Your local dive store is your best resourse. If I needed anything other than a completely plain mask, I wouldn't think that the excursion operator would provide it. Like Mike said, some do, but I couldn't count on it. You can get either lens inserts that are like those clingy window stickers, easily removeable/reuseable, or you can get your prescription made into a mask.