You have an abnormality in the insertion of the right upper eyelid levator aponeurosis. That is the tendon in the eyelid is centrally disinserted. You may have had that from birth or early childhood. For others, they can acquire these type of changes over time perhaps from just rubbing or blinking the eyes over a long period of time. In other words, these changes are common. Your photo shows that you have a slightly heavy right upper eyelid with significant eyelid platform show and a compensatory eyebrow elevation. The fold on the right side is high and not nearly as full as the left side. With the disinsertion of tendon, anterior orbital fat slides up with the tendon. The compensatory elevation of the eyebrow also lifts some fat volume that contributes to the fullness of the fold is hiked up with the brow. By fixing the ptosis, repositioning the fat, lowering the crease, and performing an anchor blepharoplasty, it is possible to make the right upper eyelid to look much more like the right upper eyelid. Your potential surgeon should truly understand double fold surgery and not simply attempt to make both eyes look a like but rather make them look alike while maintaining the natural double fold character of your eyes.