Because the nose does not buckle it with a nose clip is good.
Because ordinary goggles and diving face mirror is different. The lens of the diving mirror is tested by water pressure, and can bear the pressure of 50 meters water depth. And the surface of the snorkeling mirror only takes the pressure of 10 meters deep water.
When in direct contact with the human eye and the water, the light refraction angle will be slightly different from the air, cause eyes to focus, image blur, between the mirror and the eyes of the phreatic surface air just to solve this problem.
Diving face mirror (English: Diving mask, also known as: dive mask or scuba mask), is a kind of diving equipment, can make scuba divers, divers and free snorkeling people can clearly see the bottom.
I tried to dive, with a nose clip can also, but only for a very shallow depth, if the depth, you should first consider his swimming glasses skirt is completely close to the orbital region, each additional ten meters a large increase in pressure, too deep, I think you may have eyes charges. If you're stressed, it's possible to press your eyes out. So try not to risk it. There is no problem within 3 meters, 3 meters below have not tried.
