Is there any reason snorkeling would cause black eyes?

Question

I went snorkeling for a couple hours and when I got home I realized I had 2 black eyes. It was very faint but noticable. It lasted for a couple days.

Answer 1

Very likely a mask squeeze. As you descend, you have to allow a little air into your mask (through your nose). If not it will be pressed tightly against your face as a relative vacuum is generated between the outside water pressure and the partially equalized pressure within the space enclosed by the mask. This can cause small vessels to rupture leading to bruising, black eyes, ruptured vessels of the sclera of the eye and nose bleeds.

Answer 2

The air pressure in your goggles caused it

Answer 3

the water pressure on your mask

Answer 4

the water pushed on UR mask

Answer 5

The water pressure pushed on your goggles that's why u have black eyes.