1. Curtis TM, Gardiner TA, Stitt AW. Microvascular lesions of diabetic retinopathy: Clues towards understanding pathogenesis? Eye (Lond). 2009;23(7):1496-1508. doi: 10.1038/eye.2009.108 [doi].

2. Okamoto F, Sone H, Nonoyama T, Hommura S. Refractive changes in diabetic patients during intensive glycaemic control. Br J Ophthalmol. 2000;84(10):1097-1102.

3. Wang X, Tang L, Gao L, Yang Y, Cao D, Li Y. Myopia and diabetic retinopathy: A systematic review and meta-analysis. Diabetes Res Clin Pract. 2016;111:1-9. doi: 10.1016/j.diabres.2015.10.020 [doi].

4. Yau, J.W., et al., Global prevalence and major risk factors of diabetic retinopathy. Diabetes Care, 2012. 35(3): p. 556-64.

5. Lee, R., T.Y. Wong, and C. Sabanayagam, Epidemiology of diabetic retinopathy, diabetic macular edema and related vision loss. Eye Vis (Lond), 2015. 2: p. 17.

6. Leasher, J.L., et al., Global Estimates on the Number of People Blind or Visually Impaired by Diabetic Retinopathy: A Meta-analysis From 1990 to 2010. Diabetes Care, 2016. 39(9): p. 1643-9.

7. Fong, D.S., et al., Diabetic retinopathy. Diabetes Care, 2003. 26 Suppl 1: p. S99-S102.

8. Thomas, R.L., et al., Retrospective analysis of newly recorded certifications of visual impairment due to diabetic retinopathy in Wales during 2007-2015. BMJ Open, 2017. 7(7): p. e015024.

9. Fenwick E, Rees G, Pesudovs K, et al. Social and emotional impact of diabetic retinopathy: A review. Clin Exp Ophthalmol. 2012;40(1):27-38. doi: 10.1111/j.1442-9071.2011.02599.x [doi].

10. Chen E, Looman M, Laouri M, et al. Burden of illness of diabetic macular edema: Literature review. Curr Med Res Opin. 2010;26(7):1587-1597. doi: 10.1185/03007995.2010.482503 [doi].

11. Kaminsky TA, Mitchell PH, Thompson EA, Dudgeon BJ, Powell JM. Supports and barriers as experienced by individuals with vision loss from diabetes. Disabil Rehabil. 2014;36(6):487-496. doi: 10.3109/09638288.2013.800592 [doi].

12. Schmier JK, Covert DW, Matthews GP, Zakov ZN. Impact of visual impairment on service and device use by individuals with diabetic retinopathy. Disabil Rehabil. 2009;31(8):659-665. doi: 10.1080/09638280802239391 [doi].

13. Heintz E, Wirehn AB, Peebo BB, Rosenqvist U, Levin LA. Prevalence and healthcare costs of diabetic retinopathy: A population-based register study in sweden. Diabetologia. 2010;53(10):2147-2154. doi: 10.1007/s00125-010-1836-3 [doi].

14. Woung LC, Tsai CY, Chou HK, et al. Healthcare costs associated with progressive diabetic retinopathy among national health insurance enrollees in taiwan, 2000-2004. BMC Health Serv Res. 2010;10:136-6963-10-136. doi: 10.1186/1472-6963-10-136 [doi].

15. Devenney R, O’Neill S. The experience of diabetic retinopathy: A qualitative study. Br J Health Psychol. 2011;16(4):707-721. doi: 10.1111/j.2044-8287.2010.02008.x [doi].

16. Schmitt-Koopmann I, Schwenkglenks M, Spinas GA, Szucs TD. Direct medical costs of type 2 diabetes and its complications in switzerland. Eur J Public Health. 2004;14(1):3-9.

17. Happich M, Reitberger U, Breitscheidel L, Ulbig M, Watkins J. The economic burden of diabetic retinopathy in germany in 2002. Graefes Arch Clin Exp Ophthalmol. 2008;246(1):151-159. doi: 10.1007/s00417-007-0573-x [doi].

18. Schmier JK, Covert DW, Lau EC, Matthews GP. Medicare expenditures associated with diabetes and diabetic retinopathy. Retina. 2009;29(2):199-206. doi: 10.1097/IAE.0b013e3181884f2d [doi].

19. Yau JW, Rogers SL, Kawasaki R, et al. Global prevalence and major risk factors of diabetic retinopathy. Diabetes Care. 2012;35(3):556-564. doi: 10.2337/dc11-1909 [doi].