#acromat

• Achromaturia — A pathological clinical condition manifested by the emission of completely colorless or pale urine, lacking normal urinary pigments (such as urochrome and urobilin). This phenomenon may indicate extreme dilution in diabetes insipidus, a severe inability of the kidneys to concentrate urine in advanced renal failure, or a massive and sudden intake of fluids.
• Anachromatic — Not chromatic; an optical system, lens, or transparent medium that does not produce chromatic aberrations or that has been partially or totally corrected against light dispersion. In a precise structural sense, it describes the property of a device to transmit light beams without separating the component colors of the visible spectrum, guaranteeing a faithful and clear rendering of the edges of projected images.
• Axantopsia — A rare medical term or neologism of hybrid structure used to describe a congenital or acquired visual anomaly characterized by the functional inability to perceive shades of yellow (or associated with severe forms of partial achromatopsia). It originates from the combination of the Greek elements 'a-' (privative), 'xanthos' (yellow), and 'opsis' (vision), being a terminological variant synonymous with axantopia or clinical forms of tritanopia.