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Can Visual Acuity Be Reliably Measured at Home? Validation of Telemedicine Remote Computerised Visual Acuity
Ailsa Ritchie1, Silva Atamian1, Nilpa Shah1
1Guy's and St Thomas' NHSFT, GB.
The British and Irish Orthoptic Journal
|July 19, 2021
Summary
Remote visual acuity (VA) testing at home using COMPlog software is feasible and reliable for ophthalmology patients. This method, supervised by eye care professionals, provides unbiased measurements comparable to in-clinic assessments.
Area of Science:
- Ophthalmology
- Telemedicine
- Digital Health
Background:
- The COVID-19 pandemic highlighted the need for remote patient assessment in ophthalmology.
- Visual acuity (VA) measurement is a critical component of ophthalmic evaluations.
- Telemedicine offers a potential solution for remote VA assessment.
Purpose of the Study:
- To evaluate the feasibility and reliability of at-home, computer-based visual acuity measurements.
- To assess the accuracy of COMPlog software for remote VA testing.
- To compare in-clinic VA measurements with at-home measurements.
Main Methods:
- A Bland Altman method comparison study was conducted.
- Orthoptist-supervised COMPlog computerised VA measurements were performed both in-clinic and at-home.
- Subjects used their habitual correction for logMAR VA measurements on their worse eye.
Main Results:
- 23 pediatric and 13 adult patients participated, with a wide range of visual acuities.
- No significant bias was observed between in-clinic and at-home VA measurements (mean difference -0.01 logMAR).
- Test-retest variability for both in-clinic and at-home measurements was within acceptable ranges (≤0.12 logMAR).
Conclusions:
- Remote home VA testing using COMPlog and video conferencing is feasible and reliable.
- Eye care professional supervision ensures unbiased measurements with acceptable test-retest reliability.
- At-home VA testing is a viable option for appropriately equipped patients.
