ObjectiveTo investigate the effectiveness of retro-orbicularis oculi fat resection in Park double eyelid surgery to correct the swollen upper eyelid.MethodsBetween September 2015 and July 2016, partial resection of the retro-orbicularis oculi fat was performed on 32 cases with bilateral swollen upper eyelids in Park double eyelid surgery. There were 10 males and 22 females with an average age of 25 years (range, 19-32 years). The patients had normal function of the levator muscle, and had no history of double eyelid surgery.ResultsAll the incisions healed by first intention. There was no obvious congestion, swelling, levator muscle dysfunction. All patients were followed up 2-14 months, with an average of 10 months. The double eyelid fold was naturally smooth, without depressed scar; blepharochalasis was obviously improved, and the function of upper eyelid levator muscle was normal. All patients were satisfied with the aesthetic effect.ConclusionPark double eyelid surgery and partial resection of retro-orbicularis oculi fat can effectively improve the aesthetic effect in patients with swollen upper eyelid, and can achieve the perfect function and appearance.