COSMIN database

The measurement of visual sampling during real-world activity in Parkinson's disease and healthy controls: a structured literature review

Stuart, S., Alcock, L., Galna, B., Lord, S., and Rochester, L.
BACKGROUND: Visual sampling techniques are used to investigate the complex role of vision during real-world activities in Parkinson's disease. Earlier research is limited to static simple tasks or measurement of eye movements alone, but more recent investigations involve more real-world activities. The approach to the objective measurement of eye movements varies with respect to instrumentation, testing protocols, and mediating factors that may influence visual sampling.

OBJECTIVES: The aim of this review was to examine previous work measuring visual sampling during real-world activities in Parkinson's disease to inform the development of robust protocols. Within this review a real-world activity was considered to be a goal-orientated motor task involving more than one body segment such as reaching or walking.

METHODS: Medline, Embase, PsychInfo, Scopus, Web of Knowledge, PubMed and the Cochrane library databases were searched. Two independent reviewers and an adjudicator screened articles that described quantitative visual sampling in people with Parkinson's disease and healthy controls.

RESULTS: Twenty full-text articles were screened and 15 met inclusion/exclusion criteria. A wide range of instruments and outcome measures were reported which were generally used in a task-dependent manner. Instrument reliability and validity was insufficiently reported in all studies. Few studies considered mediators of visual sampling such as visual or cognitive deficits.

CONCLUSIONS: Future research is required to accurately characterise visual impairments in Parkinson's disease and during real-world activities. Composite use of instruments may be required to achieve reliability and validity of visual sampling outcomes which need to be standardised. Recommendations also include assessment of cognition and basic visual function.
J Neurosci Methods
1872-678X (Electronic)
Publication year:
Biological and physiological variables:
Biological and physiological variables
Functional status:
Physical functioning
Adults (18-65)
Seniors (65+)
Diseases of and symptoms related to the nervous system
PRO / non-PRO:
Non-patient Reported Outcome
Type of measurement instrument:
4 - Performance-based tests
5 - Videos
6 - Clinical rating scales
7 - Observations
8 - Imaging tests
9 - Laboratory tests
3D motion analysis
3D referencing system
ARGOS - Automobile for Research in Ergonomics and Safety
EOG - electrooculogram
Force Platform
LTIT - Landmark and traffic sign identification test
Mobile eye tracker
Mobile infra-red eye tracker
Mobile video oculography
Static infra-red eye tracker
Touch-sensitive screen
video observations