1.      Terry TL. Extreme prematurity and fibroblastic overgrowth of persistent vascular sheath behind each crystalline lens. Am J Opthalmol. 1942;25:203–6.

2.      Valentine PH, Jackson JC, Kalina RE, Woodrum DE. Increased survival of low birth weight infants: Impact on the incide-nce of retinopathy of prematurity.  Pedia-trics.1989;84:442–5. [PubMed: 2788864]

3.      Deborah KV, John AF. Retinopathy of prematurity. In: Cloherty JP, Eichenwald EC, Stark AR, editors. Manual of Neonatal Care. 6th ed. Philadelphia: Lippincott Williams and Wilkins; 2004. pp. 640–4.

4.      Rekha S, Battu RR. Retinopathy of prematurity: Incidence and risk factors. Indian Pediatr. 1996;33:999–1003. [PubMed: 9141799]

5.      Charan R, Dogra MR, Gupta A, Narang A. The incidence of retinopathy of premat-urity in a neonatal care unit. Indian J Ophthalmol. 1995;43:123–6.[PubMed: 8822486]

6.      Kim TI, Sohn J, Pi SY, Yoon YH. Postnatal risk factors of retinopathy of prematurity. Paediatr Perinat Epidemiol.  2004;18:130–4. [PubMed: 14996252]

7.      Kaempf JW, Kaempf AJ, Wu Y, Stawarz M, Niemeyer J, Grunkemeier G. Hyperglycemia, insulin and slower growth velocity may increase the risk of retinopathy of prematurity. J Perinatol.  2011;31:251–7. [PubMed: 21233796]

8.      Cooke RW, Clark D, Hickey-Dwyer M, Weindling AM. The apparent role of blood transfusions in the development of retinopathy of prematurity. Eur J Pediatr. 1993;152:833–6. [PubMed: 8223786]

9.      Gupta VP, Dhaliwal U, Sharma R, Gupta P, Rohatgi J. Retinopathy of prematurity - risk factors. Indian J Pediatr. 2004;71:887–92. [PubMed: 15531829]

10.  Chinese Medical Association. Guidelines on oxygenation policies and on prevention and treatment of retinopathy of prematurity.  Zhonghua Yan KeZa Zhi.2005;41:375–6.

11.  American Academy of Pediatrics Section on Ophthalmology; American Academy of Ophthalmology; American Association for Pediatric Ophthalmology and Strabismus. Screening examination of premature infants for retinopathy of prematurity.  Pediatr. 2006;117:572–6.

12.  KumarP, SankarMJ,DeorariA,et al. Risk factors for severe retinopathy of prematurity in preterm low birth weight neonates Indian J Pediatr 2011;78:812--‐6.

13.  Murthy KR, Nagendra BK. Analysis of risk factors for the development of ROP in preterm infants at a tertiary referral hospital in South India. ActaMedica Lituanica.2006;13:147–51

14.  Lancet Ann Hellström, Lois E H Smith, Olaf Dammann. Retinopathy of prematurity. Lancet 2013; 382: 1445–57

15.  Palmer AE, Hardy RJ, Dobson V. Cryotherapy for Retinopathy of Prematurity Cooperative Group. Outcomes following Threshold Retinopathy of Prematurity. Final results from the multicenter trial of cryotherapy for retin-opathy of prematurity. Arch Ophthalm-ol. 2005;123:311–8. [PubMed: 15767472]

16.  Early Treatment For Retinopathy Of Prematurity CooperativeGroup. Revised indications for the treatment of retinopathy ofprematurity: results of the early treatment for retinopathy of prematurity randomized trial. Arch Ophthalmol2003; 121:1684–94.

17.  Coats DK, Aaron MM, Mohamed AH. Involution of retinopathy of prematurity after laser treatment:     Factors associated with development of retinal detachment.  Am J Ophthalmol.  2005;140:214– 22. [PubMed: 16086945]