Contacts are okay as long as they are the soft kind. If you wear hard lenses it is not advisable to wear them at pressure, or while Scuba diving.
Subjective Answer
I am reporting in, my instructor wears contacts for tech dives to 250' plus, and I have worn contacts for 52 dives to depths of 125' without issue. Many modern soft contacts are 'gas permeable' meaning gas can escape through them. I decided to play it safe prior to getting contacts for diving and went to a full blown ophthalmologist (not just some fool at a glasses store). He said that it wouldn't be an issue at all.
Addition
I am a scuba instructor for more than 25 years with thousands of dives as well as being a tech diver that has made multiple 400 foot dives. I too wear contacts and have never had a problem. I wear "hard" lenses referred to as rigid gas permeable lenses. Gas exchange does occur and there are no known problems. There is also no pressure differential where you can't equalize a contact lens ... otherwise they would be popping off during an ascent - which simply does not occur. I have only had a lens come out twice during my years of diving and my mask has always trapped the lens for me.
Correction
Most of the time you can snorkel safely with contacts (barring the risk of losing them). However, in extreme cases (where you snorkel a lot, very deep, or both) you can interfere with gas exchange (nitrogen in this case) over the surface of the cornea, and in very extreme cases you can seriously damage the cornea as micro-bubbles form.
For most snorklers, this is a very unlikely problem. However, it shoud be noted that groups of pearl divers in the South Pacific actually got the bends while free-divig for pearls (90' dives, 4 minutes surface interval between dives, lots and lots of repetitiion).
As studies have not conclusively investigated gas exchange across the cornea, I would personally avoid diving with contacts. Note that it's easy and inexpensive to get almost any prescription lens sized for your mask.
User:Cjonb23:08, 2 Jun 2008 (UTC)
Fine for surface snorkelingI have been snorkeling for decades (gave up diving) and on the surface, gas exchange is no more an issue than when standing on the shore.The mask's water/glass/air interface provides a bit of magnification, so myopic people like me can snorkel ok without contacts, but I have found that wearing the contacts makes quite a difference in finding those well-camouflaged fish, especially if the reef is more than a couple meters down.
The advent of "disposable" contacts (it used to be $60 to replace one contact!) makes snorkeling with contacts stress-free. Just remember to bring your back-up glasses as snorkeling is a water activity and increases the odds of losing one.
Discover scuba is an introductory scuba experience..... Designed to let someone acquaint themselves with the feel of breathing underwater.... Wearing dive equipment...etc. The dive may be used toward the open water cert.
children should not scuba dive.
A scuba diver can purchase many things for scuba diving at the Air Hog online shop. They can purchase dive knives, dive lights, dive computers, and dive bags which will help them in scuba diving.
You can scuba dive if you have the contaceptive implant. There are no activity restrictions associated with this method.
scuba diving
You can scuba dive in any state
you can scuba dive anywhere in Florida. google scuba diving locations to find a place near you. the most popular place is the keys. i would suggest you travel farther south in the Caribbean to dive.
No you cannot.
Me.
No, hamsters cannot scuba dive because they are not adapted for underwater breathing. Their respiratory system is not designed for underwater environments, and they would drown if submerged in water for an extended period of time.
No, you don't need a certain body type to scuba dive. Because you use flippers to SCUBA dive, you can be a very lousy swimmer and learn to SCUBA dive. You may look stupid with a very tight wet suit during scuba diving, but you can dive. When I got certified, I learned that you have a very slightly higher chance of the Bends during scuba diving, but this is a small percentage. The pros of scuba diving outweigh the cons.
a great place to scuba dive is Egypt also dubi and turkey there also scuba diving sessions at sea life centres everywhere too.