Evidence map›Paper›PMID 34278227›Full record

ArticleThe British and Irish orthoptic journal2021

Can Visual Acuity Be Reliably Measured at Home? Validation of Telemedicine Remote Computerised Visual Acuity Measurements.

Ailsa Ritchie, Silva Atamian, Nilpa Shah, Alistair Laidlaw, Christopher Hammond

Open access · diamondAbstract read
In one paragraph

Article in The British and Irish orthoptic journal, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.

0numbers the graph read from it
0cells of the map it votes in
8citing papers in PubMed
1.5field-weighted citation impact, top 18% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

8 citing papers in PubMed, 13 citations in OpenAlex.

  1. Trial
  2. Trial
  3. Article
  4. Exploring Parental Views of Remote Vision Testing in Children.The British and Irish orthoptic journal · 2026
    Article
  5. Evaluation of the Amblyopia tracker app.Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie · 2024
    Article
  6. Article
  7. Article
  8. Web-based visual acuity testing for children.Journal of AAPOS : the official publication of the American Association for Pediatric Ophthalmology and Strabismus · 2022
    Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors at 2 institutions in 2 countries.

Ailsa RitchieGuy's and St Thomas' NHSFT, GB.ORCID 0000-0003-2495-7571
Silva AtamianGuy's and St Thomas' NHSFT, GB.
Nilpa ShahGuy's and St Thomas' NHSFT, GB.ORCID 0000-0003-3127-500X
Alistair LaidlawGuy's and St Thomas' NHSFT, GB.
Christopher HammondGuy's and St Thomas' NHSFT, GB.ORCID 0000-0002-3227-2620
Guy's and St Thomas' NHS Foundation Trust · GBKing's College London · GB

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeThe recent pandemic has identified the need for telemedicine assessment of ophthalmology patients. A vital component of such assessment is visual acuity (VA) measurement. The aim of this study was to determine the feasibility and reliability of computerised 'at home' VA measurements using COMPlog software.

methodsA Bland Altman method comparison study of worse eye 'in clinic' and 'at home' orthoptist-supervised COMPlog computerised VA measurements. Subjects underwent gold standard semi-automated computerised test and retest logMAR VA measurements on their habitually corrected worse eye both 'in clinic' and 'at home.' The orthoptist ran the test from the eye clinic with the patient viewing a secondary PC monitor either in the same clinic room or at home. A screen sharing voice and video conferencing application and standard consumer IT hardware were employed to present the test optotypes in the patient's home.

results23 paediatric and 13 adult patients with a range of ocular diseases and worse eye visual acuities were included (range -0.14 to 1.06 logMAR). No significant bias was found between 'in clinic' and 'at home' measurements (mean -0.01 logMAR and 95% confidence interval -0.03, 0.00 logMAR). Test-retest variability of 'in clinic,' 'at home' and 'in clinic' versus 'at home' measurements were within normal reported ranges at 0.12 logMAR (6 ETDRS letters) or less.

conclusionRemote home VA testing performed by an eye care professional using a semi-automated VA measurement program and video conferencing application provided unbiased measurements with acceptable test-retest reliability. Home testing was both feasible and acceptably reliable in appropriately equipped patients.

Indexed as

amblyopiarefractive errorTelemedicinevision testingvisual acuity

Identifiers

PMID34278227
PMCPMC8269772
OpenAlexW3168786592

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.