These "stylish" glasses, as described by Cosmo, allow the wearer to see the otherwise invisible Anti-Fairies that are causing bad luck all over the world. In their next appearance, the concept of Anti-Fairies being invisible to the naked eye was dropped, making these glasses unnecessary.
The glasses are teal colored, and have a large sensor apparatus on top of them which is constantly blinking. Viewing through the glasses causes a blue tint.
These glasses only were used in the episode That Old Black Magic, which introduced the Anti-Fairies. The glasses were the only way to see the Anti-Fairies, who always escape on Friday the 13th to cause bad luck. With the glasses on, Timmy could see the Anti-Fairies were behind all the trouble he was encountering during his trip to Adrenalland.
Timmy later uses the glasses to make sure that Anti-Cosmo isn't the real Cosmo after he was mistaken for him.
Later, in "When Nerds Collide!", when Anti-Cosmo is trying to break out the Fairy World prision, Jorgen changes Da Rules, so that Anti-Fairies can be seen on Earth. So, after this, these glasses are never used or needed again to see Anti-Fairies.
- That Old Black Magic - the only episode these glasses are used in.