Thanks pocketvenus, you have great tips! I agree, you can also try parting your hair on the side and slightly cover the raised brow if it bothers you too much.
First I want to tell you that remember, your eyebrows are sisters not twins! I tell myself this because not only do my sister and I look NOTHING alike, but that I have the same brow issues! My left brow is always raised higher and I'm not sure if that's due to the fact that I can actually RAISE that one brow on its own... ?? Here's a few tips I have discovered to even my own pair out.
1. Use brow stencils as a shape guideline and a soft powder pencil for definition that isn't too harsh or dark. I like the Anastasia brow stencils and the Dior Brow Styler pencil which is in one universal shade. You can fill in your brows to be a bit thicker which can make them appear slightly more equal in size.
2. Use a brow highlighter with a slight sheen under your brow that is lower. This reflects light and makes the space between your brow and eye appear wider. Either a sheen or a matte color will work but that little extra sparkle can help.
Urban Decay eyeshadow in "sin"
Stila Eyeshadow in "Chinois"
I hope this can help you! Don't worry too much about their unevenness, it is what makes you, you!
I was in a car accident in my teens - it wasn't serious but I got a black eye and now one eyebrow is slightly higher than the other. So I feel your frustration!
You can definitely try to shape your brows with a brow pen/pencil to make them look more similar, and one can always pluck strategically.
Also, consider a different haircut. A cute sweep of bangs over your right forehead would lessen the difference. If not, it's probably best to avoid parting your hair dead centre as this would emphasize facial assymetry.