1. WHO, Country Health Indicators: Costa Rica. (2003). 
2. UNDP, Human Development Report, Country Sheet: Costa Rica (2003). 
3. Ibid. 
4. Ibid. 
5. WHO, Country Health Indicators: Costa Rica (2003). 
6. Ibid. 
7. UNDP, Human Development Report, Country Sheet: Costa Rica (2003). 
8. Ibid.
9. WHO, Country Health Indicators: Costa Rica. (2003). 
10. Ibid.
11. S. Resnikoff, D. Pascolini, D Eyta’ale, I. Kocur, R. Pararajasegaram, G. Pokharel, S. Mariotti, Bulletin of the World Health Organization (2004), “Global Data on Visual Impairment in the Year 2002” 82:11. This number was estimated based on population surveys from all countries in Americas region in the same mortality stratum as Costa Rica.
12. 0.3% of the total population.
13. S. Resnikoff, et. al.
14. 1.7% of the total population.
15. S. Resnikoff, et al.
16. Ibid.
17. C. Gilbert and A. Foster, Bulletin of the World Health Organization (2001), “Childhood Blindness in the Context of VISION 2020 – The Right to Sight,” 79:3.
18. VISION 2020, IAPB, WHO, State of the World’s Sight VISION 2020: The Right to Sight 1999-2005.
19. 24.4 ophthalmologists per 1 million = 101 in a population of 4,173,000.