There are two options that you might want to consider.

The first is to wear contact lenses.  The soft ones don't come out very
easily even if your mask floods.  Some people, myself included, find that
the lenses dry out and become uncomfortable when worn inside a mask for a
long time though.

The second option is to get prescription lenses fitted inside a mask.  Your
optician should be able to arrange this but it can be expensive.  I have a
frame that looks like the front of a pair of glasses but without the legs.
It snaps into the mask very securely.  The advantage of this is that the
frame takes ordinary spectacle lenses so you dont need a complete new mask
if your vision changes.  Also you can opt to use contact lenses for pool
training.

The disadvantage of this systen is that water and mist can get trapped
between the lenses and the mask glass, which reduces your visibility a bit.
Also, when you take the mask off on the beach or boat, you can't see.

Regards,

Richard

Some dive shops stock prescription lenses with your diopter. The
complete new mask and lenses should be $90 or so and they would be
able to set you up immediately.

"Ignoramus6098"

The gods of rec.scuba are very hard to offend.

Good idea.  The gods approve.

It depends on what you consider "not too expensive."  A few years ago, I
bought my father a TUSA Liberator mask.  The mask itself was about $50,
reasonable for a quality mask.  The Tusa mask has two lenses and then make
them in various diopters for near sighted people (can see near, not see
far).  Unfortunately, they do not make them, or didn't at the time, for far
sighted people.  I had to have them custom made, and that cost a bit more
than the mask.  In my personal opinion, this is a good option for anybody
that will use the mask at least occasionally.

$50 for a mask may sound like a lot to you, but, all things considered, it
isn't.  For any snorkeler or diver, mask fit is one of the most important
aspects of your equipment.  Sure, for us divers, there are life support
items that have to work, or else, but if the mask does not fit, or is of
such poor quality that you can't keep it from fogging up every minute or so,
you're not going to enjoy that dive, no matter how much you spend on
everything else.  You can have fun with really junk fins and a cheap snorkel
works pretty much like an expensive one, but a bad mask simply can not be
tolerated.

Having said that, get some help from a shop that has a wide variety of mask
styles.  They'll be able to help you find something that will take your
perscription, that will fit and not leak and, with a little luck, won't
break the bank in the process.

Lee

Prescription masks can be had for anywhere from $75 to way-too-much. It
might be worth checking to see if standard diopter masks are available for
rent for a few extra bucks. SCUBA shops often have the whole range from -1
to -8 right on the shelves.