Prevalence of Colour Blindness in Young Jordanians

• Published in: Ophthalmologica (Basel) Vol. 215; no. 1; pp. 39 - 42
• Main Authors: Al-Aqtum, Musa T., Al-Qawasmeh, Mohammed H.
• Format: Journal Article
• Language: English
• Published: Basel, Switzerland Karger 01.01.2001; S. Karger AG
• Subjects: Adolescent; Adult; Biological and medical sciences; Color Perception Tests; Color Vision Defects - epidemiology; Color Vision Defects - genetics; Female; Gene Frequency; Humans; Incidence; Jordan - epidemiology; Male; Medical sciences; Ophthalmology; Original Paper · Travail original · Originalarbeit; Phenotype; Prevalence; Tropical medicine; Vision disorders; Jordan; Asia; Ishihara colour plates; Colour blindness; Jordan; Human; Eye disease; Prevalence; Color vision; Vision disorder; Young adult; Blindness; Epidemiology
• ISSN: 0030-3755; 1423-0267
• DOI: 10.1159/000050824

Colour blindness is one of the common genetic disorders observed in all human populations. It is a sex-linked recessive trait. The genes are located on the X chromosome within the Xq28 band. 1,418 university students (1,200 female and 218 male) from Zarka Private University and the Hashemite University were randomly selected and tested for congenital red/green colour blindness, by using Ishihara pseudo-isochromatic colour plates. A total of 23 individuals were found to be colour blind. In females, 4 students (0.33%) were colour blind: 1 of them showed protanomalia, 1 protanopia and 2 deuteranomalia. In males, 19 students (8.72%) were colour blind: 4 showed protanomalia, 3 protanopia, 8 deuteranomalia and 4 deuteranopia. The allelic frequencies of the colour vision gene were found to be 0.087 in males, 0.003 in females and 0.016 in the total population. Studies on colour blindness in Jordan are very few; this population-based investigation is meant to fill a gap in this field.