Table 2.

PICOs criteria and determinants

PICOs criteria	Determinants
Patient	Individuals with MDD, persistent depressive disorder/dysthymia, dysphoria, disruptive mood dysregulation disorder, premenstrual disphoric disorder, seasonal affective disorder, minor/subclinical/subthreshold depression or bipolar disorder in depressive phase. Mean age of study sample must be between 18 and 60 years
Intervention	Any eye movement tasks (saccade tasks, smooth pursuit tasks, fixation tasks, free-viewing tasks, attentional disengagement tasks, visual search tasks, attentional blink tasks)
Comparison	Healthy individuals, mean of study sample between 18 and 60 years
Outcome	Task performance and/or any eye movement outcome (performance, saccade/fixation, pupil and blink metrics; see above)
Study design	Experimental non-randomised studies

MDD, major depressive disorder.