1. Mackenzie W. A practical treatise on the diseases of the eye. 4th ed. London, England: Carter, Hendee;1854.
2. Wicherkiewicz B. Congenital anomalies of the upper tear passages. Post Okul Krakow. 1905; March-April:596.
3. Kleczkowski . Postep. Okulistyczny. 1908; 11.
4. Bacskulin J. Double, triple and quadruple lacrimal puncta. Klin Monatsbl Augenheilkd. 1964; 144:418–28.
5. Schoute GJ. Canalicule lacrymal surnumeraire. Arch Ophtalmol (Paris). 1901; 21:320–3.
6. Kirk RC. Developmental anomalies of the lacrimal passages; a re-view of the literature and presentation of three unusual cases. Am J Ophthalmolol. 1956; 42:227–32.
7. Carvill M. Congenital fistulae of the lacrimal canaliculi. Arch Ophthalmol. 1909; 38:585–90.
8. Tooke FT. On so-called doubling of the puncta lacrimalia. Ophthal- mology: Essays, Abstracts and Reviews. 1910; 6:391–4.
9. Chance B. Supernumerary punctum. Am J Ophthalmol. 1922; 5:297.
10. Bothman L. Double puncta and double canaliculi of the upper lid. Am J Ophthalmol. 1932; 15:214–5.
Article
11. Flom L, Levitt JM. Double lacrimal puncta and dacryops. AMA Arch Ophthalmol. 1955; 54:760–1.
Article
12. Veirs ER. Disorders of the canaliculus. In: The Lacrimal System: Clinical Application. New York: Grune & Stratton;1955; 41–2.
13. Mann I. The lids, lacrimal apparatus and orbital contents. In: Developmental Abnormalities of the Eye. 2nd ed.Philadelphia, PA: Lippincott;1957; 389–90.
14. Duke-Elder S, Cook CA. Normal and abnormal development. Congenital deformities. In: Duke-Elder S, ed. System of Ophthal- mology. v. 3:part 2. London: Kimpton;1964; 928–34.
15. Chignell AH. Double punctum and canaliculus. Am J Ophthalmol. 1968; 65:736–9.
Article
16. Solomon A, Feiler-Ofry V, Lazar M. Congenital reduplication of the lacrimal punctum and canaliculus. Ann Ophthalmol. 1981; 13:727.
17. Coats DK, McCreery KM, Plager DA. . Nasolacrimal outflow drainage anomalies in Down’s syndrome. Ophthalmology. 2003; 110:1437–41.
Article
18. Yuen SJ, Oley C, Sullivan TJ. Lacrimal outflow dysgenesis. Op- hthalmology. 2004; 111:1782–90.
Article
19. Bair PJ, Tsai YY, Lin JM. Congenital reduplication of the lacrimal punctum and canaliculus in a patient with dry eye. Ophthalmic Surg Lasers Imaging. 2004; 35:156–8.
Article
20. Caccamise WC, Townes PL. Congenital absence of the lacrimal puncta associated with alacrima and aptyalism. Am J Ophthalmol. 1980; 89:62–5.
Article
21. Town AE. Congenital absence of lacrimal puncta in three members of a family. Arch ophthalmol. 1943; 29:767–71.
Article
22. Klapper SR, Jordan DR. Jones tube insertion in children with ca-nalicular agenesis. Ophthalmic Surg Lasers. 1999; 30:495–8.
Article
23. Clauser L, Galiè M, Hassanipour A, Calabrese O. Saethre-Chotzen syndrome: review of the literature and report of a case. J Craniofac Surg. 2000; 11:480–6.
Article
24. Miller MT, Deutsch TA, Cronin C, Keys CL. Amniotic bands as a cause of ocular anomalies. Am J Ophthalmol. 1987; 104:270–9.
Article
25. Guion-Almeida ML, Rodini ES, Pereira SC, Richieri-Costa A. Amniotic bands and the EEC syndrome. Birth Defects Orig Artic Ser. 1996; 30:171–7.
26. Hollsten DA, Katowitz JA. The ophthalmic manifestations and treatment of the amniotic band syndrome. Ophthal Plast Reconstr Surg. 1990; 6:1–15.
27. McNab AA, Potts MJ, Welham RA. The EEC syndrome and its ocular manifestations. Br J Ophthalmol. 1989; 73:261–4.
Article
28. Hay RJ, Wells RS. The syndrome of ankyloblepharon, ectodermal defects and cleft lip and palate: an autosomal dominant condition. Br J Dermatol. 1976; 94:277–89.
Article
29. Jaffe MJ, Currie J, Schwankhaus JD, Sherins RJ. Ophthalmic midline dysgenesis in Kallmann syndrome. Ophthalmic Paediatr Genet. 1987; 8:171–4.
Article
30. Markowitz GD, Handler LF, Katowitz JA. Congenital euryblepharon and nasolacrimal anomalies in a patient with Down syndrome. J Pediatr Ophthalmol Strabismus. 1994; 31:330–1.
Article
31. Bowling BS, Chandna A. Superior lacrimal canalicular atresia and nasolacrimal duct obstruction in the CHARGE association. J Pediatr Ophthalmol Strabismus. 1994; 31:336–7.
Article
32. Satchi K, McNab AA. Double lacrimal punta: Clinical presentation and potential mechanisms of epiphora. Ophthalmology. 2010; 117:180–3.e2.