John L,
I didn't do any captures to illustrate but you can experiment if you wish.
Here's what I've found from experimenting:
\SetSwitchIntensity [switch= expEyesTrust f0= 4.000000 t= 0.4]
The EyesTrust adjusts the upper eye lid DOWN. A leading integer increases the amount that the eye lid closes. In the example above, your character's eyes could indicate eyes that are very tired, intoxicated or under hypnosis. The leading 4 is normally a 0.
\SetSwitchIntensity [switch= antiTrust f0= 0.000000 t= 0.4]
The antiTrust adjusts the upper eye lid UP. Again a leading integer has dramatic and often exaggerated effects.
\SetSwitchIntensity [switch= expEyesDistrust f0= 0.000000 t= 0.4]
The EyesDistrust adjusts the bottom lid UP.
\SetSwitchIntensity [switch= antiDistrust f0= 0.000000 t= 0.4]
The antiDistrust adjusts the lower eye lid DOWN.
\SetSwitchIntensity [switch= blinks f0= 0.000000 t= 0.1]
The blinks switch adjusts how far the bottom lid will travel during a blink cycle.
Hope this gives you some inSIGHT!