x Novel web application for self-assessment of distance visual acuity to support remote consultation: a real-world validation study in children - Human insight

Novel web application for self-assessment of distance visual acuity to support remote consultation: a real-world validation study in children


HumanInsight Novel web application for self-assessment of distance visual acuity to support remote consultation: a real-world validation study in children

BMJ Open Ophthalmol. 2021 Sep 30;6(1):e000801. doi: 10.1136/bmjophth-2021-000801. eCollection 2021.

ABSTRACT

OBJECTIVE: The difficulty in accurately assessing distance visual acuity (VA) at home limits the usefulness of remote consultation in ophthalmology. A novel web application, DigiVis, enables automated VA self-assessment using standard digital devices. This study aims to compare its accuracy and reliability in children with clinical assessment by a healthcare professional.

METHODS AND ANALYSIS: Children aged 4-10 years were recruited from a paediatric ophthalmology service. Those with VA worse than +0.8 logMAR (Logarithm of the Minimum Angle of Resolution) or with cognitive impairment were excluded. Bland-Altman statistics were used to analyse both the accuracy and repeatability of VA self-testing. User feedback was collected by questionnaire.

RESULTS: The left eyes of 89 children (median 7 years) were tested. VA self-testing showed a mean bias of 0.023 logMAR, with a limit of agreement (LOA) of ±0.195 logMAR and an intraclass correlation coefficient (ICC) of 0.816. A second test was possible in 80 (90%) children. Test-retest comparison showed a mean bias of 0.010, with an LOA of ±0.179 logMAR, an ICC of 0.815 and a repeatability coefficient of 0.012. 96% of children rated the test as good or excellent, as did 99% of their parents.

CONCLUSION: Digital self-testing gave comparable distance VA assessments with clinical testing in children and was well accepted. Since DigiVis self-testing can be performed under direct supervision using medical video consultation software, it may be a useful tool to enable a proportion of paediatric eye clinic attendances to be moved online, reducing time off school and releasing face-to-face clinical capacity for those who need it.

PMID:34651083 | PMC:PMC8487205 | DOI:10.1136/bmjophth-2021-000801

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