1. Refinement and preliminary evaluation of two tablet‐based tests of real‐world visual function
- Author
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David P. Crabb, Iris Tigchelaar, Iain B. H. Wilson, Pete R. Jones, Wei Bi, Deanna J Taylor, and Giorgia Demaria
- Subjects
Adult ,Male ,face discrimination ,medicine.medical_specialty ,Adolescent ,Visual impairment ,Vision, Low ,CONTRAST SENSITIVITY FUNCTION ,Audiology ,Contrast Sensitivity ,Young Adult ,03 medical and health sciences ,0302 clinical medicine ,GLAUCOMA ,SEARCH ,visual function ,medicine ,Humans ,Vision, Ocular ,ACUITY ,Visual search ,visual search ,Vision Tests ,tablets ,real world ,RECOGNITION ,Reproducibility of Results ,Original Articles ,Repeatability ,PERFORMANCE ,Emmetropia ,MACULAR DEGENERATION ,Sensory Systems ,Test (assessment) ,Comprehension ,ADULT INTELLIGENCE SCALE ,Ophthalmology ,VISION ,Cohort ,030221 ophthalmology & optometry ,Normative ,Female ,Original Article ,Patient-reported outcome ,medicine.symptom ,Psychology ,FIELD LOSS ,030217 neurology & neurosurgery ,Optometry - Abstract
PURPOSE: To describe, refine, evaluate, and provide normative control data for two freely available tablet-based tests of real-world visual function, using a cohort of young, normally-sighted adults. \ud \ud METHODS: Fifty young (18-40 years), normally-sighted adults completed tablet-based assessments of (1) face discrimination and (2) visual search. Each test was performed twice, to assess test-retest repeatability. Post-hoc analyses were performed to determine the number of trials required to obtain stable estimates of performance. Distributions were fitted to the normative data to determine the 99% population-boundary for normally sighted observers. Participants were also asked to rate their comprehension of each test. \ud \ud RESULTS: Both tests provided stable estimates in around 20 trials (~1-4 min), with only a further reduction of 14%-17% in the 95% Coefficient of Repeatability (CoR95 ) when an additional 40 trials were included. When using only ~20 trials: median durations for the first run of each test were 191 s (Faces) and 51 s (Search); test-retest CoR95 were 0.27 d (Faces) and 0.84 s (Search); and normative 99% population-limits were 3.50 d (Faces) and 3.1 s (Search). No participants exhibited any difficulties completing either test (100% completion rate), and ratings of task-understanding were high (Faces: 9.6 out of 10; Search: 9.7 out of 10). \ud \ud CONCLUSIONS: This preliminary assessment indicated that both tablet-based tests are able to provide simple, quick, and easy-to-administer measures of real-world visual function in normally-sighted young adults. Further work is required to assess their accuracy and utility in older people and individuals with visual impairment. Potential applications are discussed, including their use in clinic waiting rooms, and as an objective complement to Patient Reported Outcome Measures (PROMs).
- Published
- 2019