Abstract:

Congenital color vision deficiencies (dyschromatopsias) are inherited visual disorders 
characterized by impaired or absent function of specific photoreceptors in the retina. They occur 
predominantly in males due to an X-linked recessive inheritance pattern and may cause significant 
social and occupational difficulties. This article presents contemporary diagnostic and therapeutic 
approaches for these conditions, with a particular focus on the use of the X-CHROM® contact lens. 
This red filter lens, applied to the non-dominant eye, does not cure the underlying color deficiency 
but enhances color discrimination through binocular interaction and the creation of new visual 
contrasts. A clinical case of a 45-year-old male patient with deuteranomaly is presented, in whom 
the application of the X-CHROM® lens resulted in normal trichromacy in the non-dominant eye 
and a substantial improvement in binocular color perception. The results confirm that the X
CHROM® lens is an effective and accessible method for functional compensation in 
dyschromatopsias and contributes to improved social adaptation of affected individuals. 

Keywords: congenital color vision deficiency; dyschromatopsia; deuteranomaly; X-CHROM®; 
contact lens; color blindness; trichromacy; color vision correction. 

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