What Could've Caused my Uneven Eyes?

Asymmetry between the two eyes can have various causes. Some of these causes include:
difference in upper eyelid positiondroopy eyelid (eyelid ptosis), eyelid retraction, etc. difference in lower eyelid positionreverse eyelid ptosis, eyelid retraction, etc. difference in eyeball positionsunken eye (enophthalmos, hypoglobus), bulging eye (proptosis, exophthalmos), etc. orbital asymmetryfacial asymmetryetc. 
The treatment  depends on what is causing your issues. You should see an Oculoplastic surgeon and Ophthalmologist for a complete evaluation. 

Small amount of asymmetry between the eyes is very normal. If you look closely at most people you will notice a subtle degree of asymmetry.  However, when this asymmetry becomes more severe and can detract from one's overall aesthetic.  
There are a number of reasons eyebrows, eyelids, and eyes themselves can be asymmetric relative to the other side. Relative differences in muscle or nerve activity on one side of the face is common and can make one eyebrow move more and have a higher resting position.  Contact lens use over many years, especially hard lenses can produce significant amounts of ptosis (droopy eyelids).  Lower eyelid changes are typically related to genetics (what your parents looked like) and ethnic variations.  A history of prior surgery, sun damage, or injuries can also lead to changes in eyelid position.
Changes in actual eye position are typically related to changes in the volume of the orbit (eye socket). When the eye socket enlarges due to normal aging, trauma, disease processes then one eye can sink in or move down.  If the volume of the eye socket increases such as in something like thyroid related eye disease the eye can protrude out and can even point in different directions due to changes in eye muscles creating the illusion of a change in eye position.
As you can see, the eye area can be very complex and requires evaluation by an expert in the area to make sure you are getting the best care.  An examination in person would be your best first step to measure the eyes and degree of asymmetry.  Based on your age, I would usually recommend against anything surgical to address the asymmetry, unless it is significant or related to a disease process, as this can potentially lead to problems down the road as the aging process continues.  Good luck.

Difference in the eye are normal. You do certainly have a bit of scleral show on the lower lids. The difference in brow is all related too because if your brain detects less light getting in it will compensate by trying to open the eyes bigger- this can lead to difference in the brow position.
Wish you the best in your journey,
Dr Leo Kim, Specialist Plastic Surgeon in Sydney