Original scientific paper

Frequency of Congenital Dyschromatopsias in Male Population of the Split-Dalmatian County in Croatia

Veljko Rogošić
Lovro Bojić
Ksenija Karaman
Venera Lakoš-Krželj
Damir Mendeš
Milan Ivanišević

Abstract

A population of 9974 healthy male subjects (aged 15-45 years) was screened for congenital dyschromatopsia. The study group consisted of subjects applying for a driving licence in the Split-Dalmatian County between 1996 and 1999. The aim was to establish colour vision deficiency (dichromats) and borderline deficiencies (anomalous trichromats) in candidates through complete ophthalmologic examination including the Ishihara pseudoisocromatic plates, anomaloscope Nagel II, and Hue Lanthony colour test. The frequency of congenital dyschromatopsias was 8.48 %. This frequency includes 2.39 % dichromats (1.49 % protanops and 0.90 % deuteranopes) and 6.09 % anomalous trichromats (1.27 % protanomals, 4.20 % deuteranomals, 0.21 % extreme protanomals and 0.41 % extreme deuteranomals). It is important to recognise and classify dyschromatopsias according to type and severity in order to avoid misinterpretation of results and consequent unjustified limitations imposed on anomalous trichromats in the selection of a profession.

Keywords

anomalous trichromatism; colour vision; dichromatism; normal trichromatism

Hrčak ID:

365

URI

https://hrcak.srce.hr/365

Publication date:

23.9.2003.

Article data in other languages: croatian

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