In this study, using three phases, the investigators will use an iterative development approach to refine a behavioral intervention for managing concomitant psychosocial distress in glaucoma. Phase 1: The investigators will begin by developing a baseline intervention using strategies from Acceptance and Commitment Therapy (ACT), and delivered using a mobile application. Phase 2: The investigators will refine the baseline intervention for glaucoma patients using qualitative interviews conducted with primary open-angle glaucoma (POAG) patients with psychosocial distress (N=20), and health professionals (N=5). Phase 3: Finally, the investigators will measure acceptability and feasibility of the refined intervention through a single-armed pilot study (N=25). The investigators hypothesize that the refined intervention will yield an acceptable and feasible intervention in a POAG patient population, setting the stage for a future efficacy study.
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Change in psychosocial distress
Timeframe: Measures will be administered at baseline (A1), immediately post-intervention (A2), and 1-month post treatment assessment (A3).
Change in psychosocial distress
Timeframe: Measures will be administered at baseline (A1), immediately post-intervention (A2), and 1-month post treatment assessment (A3).
Change in vision-related quality-of-life (QoL)
Timeframe: Measures will be administered at baseline (A1), immediately post-intervention (A2), and 1-month post treatment assessment (A3).
Change in health-related QoL
Timeframe: Measures will be administered at baseline (A1), immediately post-intervention (A2), and 1-month post treatment assessment (A3).