noun
diving goggles; swimming goggles; face mask; hydroscope
Refers to goggles or a mask worn for seeing underwater, typically while swimming or diving. The term 'hydroscope' is a rare, technical equivalent.
海で魚を見るために水中メガネを使った。
I used diving goggles to see the fish in the sea.
Children's swimming goggles often come in colorful designs.