If I am not mistaken, liquid goggles are the invention of Eric Fattah (Liquivision.ca). He developed several different types - liquid goggles, liquid mask, and lately his TBD goggles that I am eager to see. There are several other freedivers who sell goggles that more or less copy the early models from Eric. That told, if you look for a superior product, Liquivision is certainly the company with most experience, and the way to go.
EDIT: this is the link to Eric's website:
Liquivision X1 Home with the photos of both types Liquivision currently sells. The TBD goggles are not yet there, but I hope Eric will tell us soon more details about them and post some photos.
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