Conclusion: The average amount of excess eyelid skin was 7.06 ± 2.52 mm, the amount of excess eyelid skin of each degree of eyelid drooping was grade 1 = 4.33 ± 2.03 mm, grade 2 = 5.92 ± 1.18 mm, grade 3 = 8.59 ± 1.18 mm.