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classifications, which uses severity and affected cone for naming.

Based on severity

Based on clinical appearance, color blindness may be described as total or partial. Total color blindness (monochromacy) is much less common than partial color blindness. Partial color blindness includes dichromacy and anomalous trichromacy, but is often clinically defined as mild, moderate or strong.

Monochromacy

Monochromacy is often called total color blindness since there is no ability to see color. Although the term may

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