Which of these concepts is NOT a color vision deficiency disorder ?

Protanopia
93
Deuteranopia
136
Emmetropia
267
Monochromacy
255
Emmetropia is the state of vision where a faraway object at infinity is in sharp focus with the eye lens in a neutral or relaxed state. Protanopia, Deuteranopia, Monochromacy - color blindness, also known as color vision deficiency, is the decreased ability to see color or differences in color.
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