Document Type : Original Article


1 Assistant Professor, Shahrekord University of Medical Sciences, Shahrekord, Iran

2 Shahrekord University of Medical Sciences, Shahrekord, Iran


Background and aims: Color blindness is a disease that remains undiagnosed in some cases. The
diagnosis of the disease during schooling is necessary to take the required measures for the future life
of adolescents. Therefore, the aim of this study was to determine the prevalence of color blindness
among the students of secondary schools in Shahrekord.
Methods: In this descriptive study, 4074 students of secondary schools across Shahrekord were
included by the cluster sampling method. Ishihara color blindness test plate was used to diagnose
color blindness. Data were analyzed using descriptive statistics (mean and percentage) by SPSS 18.
Results: In general, 362 (88.8%) patients had color blindness. Out of 2052 male students and 2022
female ones, 343 (16.71%) and 19 (0.93%) cases were diagnosed with color blindness, respectively. In
both genders, most students had deuteranopia or deuteranomalia, while other types of color blindness,
including tritanomaly, were not detected in the students.
Conclusion: The results of this study showed that the number of color blind people in the studied region
was higher compared to the results of studies in the other regions of Iran. Moreover, the prevalence of
color blindness was more in males compared to females. In addition, the prevalence of other kinds of
color blindness mainly belonged to deuteranopia or deuteranomalia.


1. Wong B. Color blindness. Nat Methods. 2011;8(6):441. doi: 10.1038/nmeth.1618. 
2. Simunovic MP. Colour vision deficiency. Eye (Lond). 2010;24(5):747-55. doi: 10.1038/eye.2009.251. 
3. Heydarian S, Mahjoob M, Gholami A, Veysi S, Mohammadi M. Prevalence of color vision deficiency among arc welders. J Optom. 2017;10(2):130-4. doi: 10.1016/j.optom.2015.12.007. 
4. Rezaieshokouh A, Najafi A. Prevalence of colour vision deficiency among male guidance school students. Medical Sciences Journal of Islamic Azad University Tehran Medical Branch. 2006;16(4):207-10. [Persian]. 5. Wise T. Colorblind: the rise of post-racial politics and the retreat from racial equity. San Francisco, CA: City Lights Books; 2010. 
6. Owsley C, McGwin G Jr. Vision and driving. Vision Res. 2010;50(23):2348-61. doi: 10.1016/j.visres.2010.05.021. 
7. The hazards of color blindness. West J Med. 2001;175(2):124. 
8. Birch J. Worldwide prevalence of red-green color deficiency. J Opt Soc Am A Opt Image Sci Vis. 2012;29(3):313-20. doi: 10.1364/josaa.29.000313. 
9. Rajavi Z, Sabbaghi H, Baghini AS, Yaseri M, Sheibani K, Norouzi G. Prevalence of color vision deficiency and its correlation with amblyopia and refractive errors among primary school children. J Ophthalmic Vis Res. 2015;10(2):130-8. doi: 10.4103/2008-322x.163778. 
10. Chakrabarti A, Chakraborti S. Red-Green Color Vision Deficiency and Lack of Awareness among Rural School Students in India. Iran J Public Health. 2015;44(7):1018-20. 
11. Dain SJ. Clinical colour vision tests. Clin Exp Optom. 2004;87(4-5):276-93. doi: 10.1111/j.1444-0938.2004. tb05057.x. 
12. Ostadimoghaddam H, Yekta AA, Heravian J, Azimi A, Hosseini SM, Vatandoust S, et al. Prevalence of Refractive Errors in Students with and without Color Vision Deficiency. J Ophthalmic Vis Res. 2014;9(4):484-6. doi: 10.4103/2008- 322x.150828. 
13. Sharifi N, Samadi-Aydenlou N. Journal of Medical Council of Islamic Republic of Iran. 2011;29(2):157-61. 
14. Rajabi A. Prevalence of Congenital Blindness in Secondary Schools in Bushehr City in 2007. Bushehr: Bushehr University of Medical Sciences; 2007. 
15. Khalaj M, Barikani A, Mohammadi M. Prevalence of color vision deficiency in Qazvin. Zahedan Journal of Research in Medical Sciences. 2014;16(1):91-3. [Persian]. 
16. Jacobs GH, Williams GA. The prevalence of defective color vision in Old World monkeys and apes. Color Res Appl. 2001;26(S1):S123-S7. doi: 10.1002/1520-6378(2001);2-6. 
17. Farokhfar A. Prevalence of Color blindness in the primary school students in Sari Township 1999. Journal of Mazandaran University of Medical Sciences. 2001;11(31):57-62. [Persian].
18. Screening examination of premature infants for retinopathy of prematurity. Pediatrics. 2006;117(2):572-6. doi: 10.1542/ peds.2005-2749. 
19. Davidoff C, Neitz M, Neitz J. Genetic Testing as a New Standard for Clinical Diagnosis of Color Vision Deficiencies. Transl Vis Sci Technol. 2016;5(5):2. doi: 10.1167/tvst.5.5.2.