Color Vision Evaluation

Color vision is a vital function mediated by retinal cones (L, M, and S), allowing the perception of a wide color spectrum. Deficiencies in color vision, such as daltonism, can be congenital or acquired. Congenital deficiencies, like anomalous trichromacy or achromatopsia, often stem from genetic mutations and primarily affect men due to their association with the X chromosome. In contrast, acquired deficiencies result from retinal diseases, drug toxicity, or aging, often presenting asymmetrically and progressively. Various color vision tests are used for diagnosis. The Ishihara pseudoisochromatic plates effectively detect congenital red-green deficiencies but lack sensitivity for acquired conditions. More advanced tools, like the Farnsworth-Munsell 100-Hue test, provide detailed analysis of severity and type but require patient cooperation and controlled conditions. Although there is no definitive cure, experimental gene therapies and filtering lenses offer potential benefits. Comprehensive assessments, combining psychophysical and genetic tests, are essential for early detection, management, and patient guidance.