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Prevalence of congenital color deficiencies in secondary-school students in Tehran

✍ Scribed by Mehdi Modarres; Mansour Mirsamadi; Gholam A. Peyman

Publisher
Springer Netherlands
Year
1997
Tongue
English
Weight
149 KB
Volume
20
Category
Article
ISSN
0165-5701

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✦ Synopsis

Purpose:

A population-based study was conducted to determine the prevalence of color deficiencies in secondary-school students (ages 12-14) in tehran.

Methods:

A total of 2,058 students (1,136 males, 922 females) were examined with ishihara pseudoisochromatic color plates.

Results:

In the study population, 97 cases of defective color vision were detected, including 93 males and 4 females. the affected individuals all had negative histories of previous systemic and ocular disease or chronic use of medications. the visual acuity was 20/20 and the fundus was normal in all affected students. of the 93 cases of defective color vision in males (8.18%), 56 cases (4.93%) involved deuteranomaly, 13 (1.14%) protanomaly, 13 (1.14%) deuteranopia, and 11 (0.97%) protanopia. the four cases in females (0.43%) involved deuteranomaly in three cases (0.32%) and protanomaly in 1 case (0.11%). deuteranopia and protanopia were not detected in females.

Conclusion:

This is the first study to determine the prevalence of congenital color blindness in iran. the results agree with reports of prevalence of congenital color blindness from western europe.

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