If we could all be born with naturally long, luscious eyelashes, then there wouldn't be a need for false lashes or products like Latisse. Luckily, you don't need a prescription to try out eyelash growth serums. Many brands, such as MAC, Urban Decay, RevitaLash, and SmartLash, offer up longer, thicker lashes without a trip to the dermatologist. The question is: do they work? We put all four brands to the test, so watch the video to see our results.