Prolonged grief disorder (PGD) is a new diagnosis that is characterized by intense and debilitating longing for, and preoccupation with, the deceased for a prolonged period of time following the loss of a loved one. Cognitive models of PGD suggest that the integration of the reality of the loss is impeded by avoidance strategies. By using a pro-/antisaccade task, we will investigate whether a constant loss-focus may serve as a perceptual filter that increases the salience of disorder-relevant stimuli that can have both reward (e.g. pictures of the deceased) and threat characteristics (e.g. death-related pictures). We will compare two groups of bereaved persons (PGD vs. no PGD) and healthy controls (intended N = 93/31 per group). In pro- versus antisaccade blocks, participants will be presented with idiosyncratic stimuli (related to death, the deceased, a living attachment figure, and the participants’ themselves) and neutral stimuli (randomly intermixed) which serve as pro-/antisaccade targets. To assess attentional biases, we will assess differences in saccade latency and accuracy (pro- vs. antisaccade) across participant groups and stimulus categories. Demonstrating systematic attentional biases will help to identify disorder-specific cognitive mechanisms and derive corresponding, targeted clinical interventions for PGD.