The World Today
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Facts about Color Blindness and EnChroma
- There are an estimated 300 million people in the world with color vision deficiency.
- 1 in 12 men are color blind (8%).
- 1 in 200 women are color blind (0.5%).
From a total of 854 samples, 850 subjects were screened for color vision test giving a response rate of 99.53%. Among the subjects, 452(53.2%) were males and 398(46.8%) were females. The study participants have a mean age of 13.26 years with a standard deviation of ±2.077 years, which ranges from 8 to 18 years. Out of 850 school children who participated for color vision test, 36 (4.24%) were color blind. The distribution of color blindness in the three schools with age, sex and literacy level is shown in (Table 1). Out of 36 color blind students, 15(1.77%) were deutan, 7 (0.82%) were protan and 14 (1.65%) were unclassified (combined form) (Fig 1).
Frequency of color blindness in the three primary schools of Gish- Abay town district, Amhara Regional State, Ethiopia, 2016
Source : https://www.researchgate.net/figure/Changes-in-distribution-of-A-age-at-first-visit-and-B-onset-age-in-male-patients-with_fig1_236959102