Optogenetic tools allow optical control of neurons by using non-native channels with endogenous photoswitches (photopigments).
Optopharmacological tools allow optical control over native endogenous ion channels by using only exogenous photoswitches.
Optogenetic pharmacological tools allow optical control over neurons by using both non-native channels AND exogenous photoswitches.
Reinventing vision with optopharmacology