When an NBA player wins the championship, they are often seen wearing goggles. There are a few reasons for this. First, it is a tradition that started with Magic Johnson. When he won his first championship in 1980, he donned a pair of aviator goggles to celebrate. The tradition has continued ever since.
Second, the goggles help protect the players' eyes from all the champagne that gets sprayed around during the post-game celebration. Third, they look cool! Wearing goggles makes the players feel like they're part of a special club - and they are! They're the champions!