Editing Opponent process (section)

===Color blindness===
{{main|Color blindness}}
[[Color blindness]] can be classified by the [[cone cell]] that is affected (protan, deutan, tritan) or by the opponent channel that is affected ([[Color blindness#Red–green color blindness|red–green]] or [[Color blindness#Blue–yellow color blindness|blue–yellow]]). In either case, the channel can either be inactive (in the case of [[Color blindness#Dichromacy|dichromacy]]) or have a lower dynamic range (in the case of [[Color blindness#Anomalous trichromacy|anomalous trichromacy]]). For example, individuals with [[deuteranopia]] see little difference between the red and green [[unique hues]].