1. Barker DE. Skin thickness in the human. Plast Reconstr Surg (1946). 1951. 7:115–116.
2. Lee Y, Hwang K. Skin thickness of Korean adults. Surg Radiol Anat. 2002. 24:183–189.
3. Hwang K, Kim DJ, Hwang SH. Thickness of Korean upper eyelid skin at different levels. J Craniofac Surg. 2006. 17:54–56.
4. Gonzalez-Ulloa M, Flores ES. Senility of the face: basic study to understand its causes and effects. Plast Reconstr Surg. 1965. 36:239–246.
5. Hykin PG, Bron AJ. Age-related morphological changes in lid margin and meibomian gland anatomy. Cornea. 1992. 11:334–342.
6. Hwang K, Kim DJ, Kim SK. Does the upper eyelid skin become thinner with age? J Craniofac Surg. 2006. 17:474–476.
7. Lipham WJ, Tawfik HA, Dutton JJ. A histologic analysis and three-dimensional reconstruction of the muscle of Riolan. Ophthal Plast Reconstr Surg. 2002. 18:93–98.
9. McLoon LK, Wirtschafter JD. Regional differences in the orbicularis oculi muscle: conservation between species. J Neurol Sci. 1991. 104:197–202.
10. Goodmurphy CW, Ovalle WK. Morphological study of two human facial muscles: orbicularis oculi and corrugator supercilii. Clin Anat. 1999. 12:1–11.
11. Hwang K, Huan F, Kim DJ. Muscle fiber types of human orbicularis oculi muscle. J Craniofac Surg. 2011. 22:1827–1830.
12. Hwang K, Kim DJ, Hwang SH. Immunohistochemical study of differences between the muscle fiber types in the pars peripheralis and marginalis. J Craniofac Surg. 2007. 18:591–593.
13. Standring S. Gray's anatomy: the anatomical basis of clinical practice. 2005. 39th ed. Edinburgh: Elsevier;500–501. 691
14. Ramirez OM, Peña G. Frontalis muscle advancement: a dynamic structure for the treatment of severe congenital eyelid ptosis. Plast Reconstr Surg. 2004. 113:1841–1849.
15. Knize DM. An anatomically based study of the mechanism of eyebrow ptosis. Plast Reconstr Surg. 1996. 97:1321–1333.
16. Karacalar A, Korkmaz A, Kale A, Kopuz C. Compensatory brow asymmetry: anatomic study and clinical experience. Aesthetic Plast Surg. 2005. 29:119–123.
17. Hwang K, Kim DJ, Hwang SH. Insertion of frontalis muscle relating to blepharoptosis repair. J Craniofac Surg. 2005. 16:965–967.
18. Rainin EA, Carlson BM. Postoperative diplopia and ptosis. A clinical hypothesis based on the myotoxicity of local anesthetics. Arch Ophthalmol. 1985. 103:1337–1339.
19. Kalichman MW. Physiologic mechanisms by which local anesthetics may cause injury to nerve and spinal cord. Reg Anesth. 1993. 18:6 Suppl. 448–452.
20. Hwang K, Lee DK, Chung IH, Lee SI. Patterns of oculomotor nerve distribution to the levator palpebrae superioris muscle, and correlation to temporary ptosis after blepharoplasty. Ann Plast Surg. 2001. 47:381–384.
21. Whitnall SE. A ligament acting as a check to the action of the levator palpebrae superioris muscle. J Anat Physiol. 1911. 45(Pt 2):131–139.
22. Hwang K, Kim DJ, Chung RS, Lee SI, Hiraga Y. An anatomical study of the junction of the orbital septum and the levator aponeurosis in Orientals. Br J Plast Surg. 1998. 51:594–598.
23. Bron AJ, Tripathi RC, Tripathi BJ. Wolff's anatomy of the eye and orbit. 1997. 8th ed. London: Arnold;14145–146.
24. Werb A. Senile ptosis. Trans Ophthalmol Soc U K. 1985. 104(Pt 1):22–25.
25. Hwang K, Kim DJ, Huan F, Han SH, Hwang SW. Width of the levator aponeurosis is broader than the tarsal plate. J Craniofac Surg. 2011. 22:1061–1063.
26. Lockwood CB. The anatomy of the muscles, ligaments, and fasclae of the orbit, including an account of the capsule of tenon, the check ligaments of the recti, and the suspensory ligaments of the eye. J Anat Physiol. 1885. 20(Pt 1):i2–i25.
27. Toldt C, Rosa AD, Paul E. An atlas human anatomy for students and physicians. 6th section. 1904. London: Rebman Limited;956u–956v.
28. Whitnall SE. The levator palpebrae superioris muscle: the attachments and relations of its aponeurosis. Ophthalmoscope. 1914. 12:258–263.
29. Whitnall SE. The anatomy of the human orbit and accessory organs of vision. 1932. 2nd ed. London: Humphrey Milford;141–146.
30. Fink WH. An anatomic study of the check mechanism of the vertical muscles of the eyes. Am J Ophthalmol. 1957. 44:800–809.
31. Manson PN, Clifford CM, Su CT, Iliff NT, Morgan R. Mechanisms of global support and posttraumatic enophthalmos: I. The anatomy of the ligament sling and its relation to intramuscular cone orbital fat. Plast Reconstr Surg. 1986. 77:193–202.
32. Ettl A, Priglinger S, Kramer J, Koornneef L. Functional anatomy of the levator palpebrae superioris muscle and its connective tissue system. Br J Ophthalmol. 1996. 80:702–707.
33. Holmstrom H, Santanelli F. Suspension of the eyelid to the check ligament of the superior fornix for congenital blepharoptosis. Scand J Plast Reconstr Surg Hand Surg. 2002. 36:149–156.
34. Holmström H, Bernström-Lundberg C, Oldfors A. Anatomical study of the structures at the roof of the orbit with special reference to the check ligament of the superior fornix. Scand J Plast Reconstr Surg Hand Surg. 2002. 36:157–159.
35. Hwang K, Shin YH, Kim DJ. Conjoint fascial sheath of the levator and superior rectus attached to the conjunctival fornix. J Craniofac Surg. 2008. 19:241–245.
36. Duke-Elder S, Wybar KC. The anatomy of the visual system. System of ophthalmology. 1961. Vol. 2. St Louis: CV Mosby;446–447.
37. Isaksson I. Studies on congenital genuine blepharoptosis. Morphological and functional investigations of the upper eyelid. Acta Ophthalmol Suppl. 1962. 72:1–121.
38. Hwang K, Huan F, Kim DJ, Hwang SH. Size of the superior palpebral involuntary muscle (Müller muscle). J Craniofac Surg. 2010. 21:1626–1629.
39. Collin JR, Beard C, Wood I. Experimental and clinical data on the insertion of the levator palpebrae superioris muscle. Am J Ophthalmol. 1978. 85:792–801.