Glossary for Dichromasy

• Achromatopsia: Patients who have achromatopsia (sometimes called achromatopia) do not have normal "cone vision.". Although the term may refer to acquired disorders such as color agnosia and cerebral achromatopsia, it typically refers to an autosomal recessive congenital color vision disorder, the inability to perceive color AND to achieve satisfactory visual acuity at high light levels (typically exterior daylight).
• Color blindness: Difficulty distinguishing colors; various subtypes
• Deuteranopia: A type of altered vision with a confusion of greens and reds
• Dichromasy: Defective colour vision
• Eye and vision conditions: Medical conditions affecting the eyes or the vision systems.
• Eye conditions: Any condition that affects the eyes
• Head Conditions: Conditions that affect the head
• Protanopia: The inability to see all four primary colours rather limited to seeing blu and yellow
• Tritanopia: A rare genetic eye condition where the individual is unable to detect blue and yellow colors but red and green vision remains normal.

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