Eyebrows are just cosmetic,they give the car a kind of mean scowling look.I'm sure you've seen them on other cars.I had the vinyl ones for a bit but I got sick of them, plus they really affected driving visability at night.The light partially showed through them as well,they're okay and can look really good, but they aren't for me anymore.
Batmanlude,my bad I didn't realize you had a 5th gen,sorry.