Oxford Visual Perception Screen for stroke survivors
At the Universtiy of Oxford, I developed a new screening test for visual perception difficulties after stroke, the Oxford Visual Perception Screen or OxVPS.
Visual perception refer to how the brain interprets the information coming from the eyes. Our eyes might be working fine, but after brain injury our brain might not be able to recognise objects or faces anymore, make up words from letters, or direct visual attention. Vision and visual perception problems are common after stroke but are not always picked up in a busy clinical environment. The available tests are too long and some are not suitable for stroke survivors with speech difficulties.
With my research project, I want to improve diagnosis of visual perception difficulties after stroke. I have interviewed occupational therapists and orthoptists (or eye movement specialists) about how they screen for visual perceptual difficulties and what their clinical needs are. They told me that they want something that is quick and does not require much training. In a national survey, I asked their colleagues from all over the UK if they agreed. With all that input, I then developed a prototype of a visual perception screen. I made both a paper version and an app. The screen has tests for object recognition, face perception, reading, visuo-motor skills, and more. We have asked opinions of stroke survivors and older volunteers too. They told us how to make the instructions more clear and how to make the app user-friendly. Eighty healthy volunteers completed the screening test to determine what the normal range of scores are for people who did not have a brain injury. In 20 stroke survivors we found very similar results between OxVPS and a well-known visual perception test.
Stroke Association (2018-2021)
Christ Church Research Centre (2019-2020)
National Institute of Health Research (2021-2026)
Prof Nele Demeyere – University of Oxford
Occupational therapists at Acute Stroke Unit – Oxford University Hospitals
Dr Phil Clathworthy – North Bristol NHS Trust
Moore, M. J., Vancleef, K., Shalev, N., Husain, M., & Demeyere, N. (2019) When Neglect Is Neglected: NIHSS observational measure lacks sensitivity in identifying post-stroke unilateral neglect. Journal of Neurology, Neurosurgery & Psychiatry, 90, 1070-1071. http://dx.doi.org/10.1136/jnnp-2018-319668
Demeyere, N., Sun, S., Milosevich, E., Vancleef, K. (2019). Post-stroke cognition with the Oxford Cognitive Screen vs Montreal Cognitive Assessment: a multi-site randomized controlled study (OCS-CARE). [version 1; peer review: 1 approved, 1 approved with reservations]. AMRC Open Res 2019, 1-12. https://doi.org/10.12688/amrcopenres.12882.1
Vancleef, K., Colwell, M. J., Hewitt, O., Demeyere, N. (2020). Current practice and challenges in screening for visual perception deficits after stroke: a qualitative study. Disability and Rehabilitation. https://doi.org/10.1080/09638288.2020.1824245
Moore, M., Vancleef, K., Riddoch, J., Gillebert, C., Demeyere, N. (2021). Recovery of Visuospatial Neglect Subtypes and Relationship to Functional Outcome Six Months After Stroke. Neurorehabilitation and Neural Repair, 35(9), 823-835. https://doi.org/10.1177/15459683211032977
Colwell, M. J., Demeyere, N., Vancleef, K. (2021). Visual Perceptual Deficit Screening in Stroke Survivors: Evaluation of Current Practice in the United Kingdom and Republic of Ireland. Disability and Rehabilitation, 1–13. https://doi.org/10.1080/09638288.2021.1970246