This publication features the RETeval device and states that flicker ERG can differentiate between Schizophrenia (SCZ) and Mentally Disordered (MDD) patients.

Schizophrenia patients have significantly reduced amplitudes (see front page Abstract and Discussion on page 6, second paragraph), while MDD have a very subtle changes, closer to healthy controls than to SCZ.

As both patient groups need different therapy approach, this would be a great addition to other tests.