Akademik
trit - Van
tritan colour blindness
tritan colour deficiency
tritanomaly
tritanopia
tritone paradox
true hallucination
true hallucinogen
true negative hallucination
Tullio phenomenon
tunnel
tv sign
twilight state and hallucinations
tympanophonia
Ulloa circle
Ulloa ring
Ulloa's bow
Ulloa's Halo
unformed hallucination
unformed vision
unformed visual hallucination
unilateral auditory hallucination
unilateral hallucination
unilateral otopathic auditory hallucination
unimodal hallucination
unstructured photopsia
upside-down reversal of seeing
VAH
valium and hallucinations