What's the non-surgical way to fix uneven eyes? (Photo)

It looks like your issue may be from droopy brows, rather than lids.  The picture shows a shadow from the brow more prominent over the left than the right eyelid.  You may wish to get this evaluated.  The only nonsurgical method which may help is botox to the brows to elevate them slightly.  Cheers

 Thank you for sharing your question. Usually, ptosis (droopy eyelid) is fixed with surgery. However, you can use an eyedrop to elevate your eyelid for about 8-10 hours. On my website you can see "Drop N Lift" which better explains this nonsurgical technique of eyelid elevation. Good luck,

You have a slight ptosis on the left.  See an oculoplastic surgeon who can evaluate the eyelid muscles and determine what surgery would be best to elevate the lid.  There is no way to do this without surgery.