placage de masque

CONT: Le placage de masque est un phénomène physique qui se produit lorsque le volume d'air situé à l'intérieur [du] masque diminue et crée un effet ventouse de plus en plus important sur le visage du plongeur. Ce phénomène se produit lorsque le plongeur effectue sa descente.

CONT: Mask squeeze results when a diver fails to maintain the balance between the air pressure within [the] mask and the external water pressure during descent.
CONT: Put simply, mask squeeze is when air is compressed inside your mask during descent, causing the mask to squeeze hard against your face.
CONT: Failure to equalize the air space by exhaling through the nose can create a negative pressure within the mask. The negative pressure, in effect, creates suction. This is referred to as mask squeeze, which can cause varying degrees of barotrauma to the soft tissues of the face and eyes.