The Oxford visual perception screen detects visual perception difficulties in sub-acute adult stroke survivors: an early cross-sectional diagnostic accuracy study.

PURPOSE: Post-stroke visual perception difficulties are common but often go undetected. The Oxford Visual Perception Screen (OxVPS) was developed to help clinicians identify these difficulties efficiently and in line with guidelines. MATERIALS AND METHODS: A prospective cross-sectional study recruited stroke survivors from three UK stroke rehabilitation units (June 2023-March 2024). Inclusion criteria were age ≥18, stroke within 6 weeks, ability to focus for 15 min, and following simple English instructions. Participants completed the index test, OxVPS, and the reference standard, Rivermead Perceptual Assessment Battery (RPAB), within 2 weeks. Early-phase diagnostic accuracy evaluation was assessed using Receiver Operator Curve analysis in complete data and in all data using random forest imputations for missing data. Completion time and rate were recorded for each test. RESULTS: In complete cases (n = 33), OxVPS showed an AUC of 0.83 (95% CI: 0.68-0.98), 85% sensitivity, and 77% specificity. Exploratory analysis of all data (n = 62) found an AUC of 0.88 (95% CI: 0.80-0.96), with 87% sensitivity and 80% specificity. On average, OxVPS was completed in 13 min with a higher completion rate (97% of subtests, p = 0.03) than RPAB. CONCLUSIONS: OxVPS provides an accurate, efficient tool for identifying visual perception issues in stroke survivors.