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Validation of a web-based distance visual acuity test.

Georgios Labiris1, Eirini-Kanella Panagiotopoulou, Konstantinos Delibasis

  • 1From the Department of Ophthalmology, University Hospital of Alexandroupolis, Alexandroupolis, Greece (Labiris, Panagiotopoulou, Bakirtzis, Panagis, Damtsi, Ntonti); Department of Computer Science and Biomedical Informatics, University of Thessaly, Lamia, Greece (Delibasis, Duzha); Ophthalmology Department, AHEPA University Hospital, Thessaloniki, Greece (Boboridis, Mokka); Ophthalmica Institute of Ophthalmology & Microsurgery, Thessaloniki, Greece (Balidis, Damtsi).

Journal of Cataract and Refractive Surgery
|February 28, 2023
PubMed
Summary
This summary is machine-generated.

The Democritus Digital Acuity and Reading Test (DDART) is a valid tool for measuring distance visual acuity (dVA) in both normal and low vision patients. It offers reliable results comparable to traditional charts in various settings.

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Area of Science:

  • Ophthalmology
  • Digital Health
  • Vision Science

Background:

  • Accurate measurement of distance visual acuity (dVA) is crucial for diagnosing and managing various eye conditions.
  • Traditional visual acuity charts can be cumbersome and less adaptable to remote or telemedical applications.
  • Digital visual acuity testing offers potential advantages in terms of accessibility and standardization.

Purpose of the Study:

  • To validate the Democritus Digital Acuity and Reading Test (DDART) as a reliable measure of distance visual acuity (dVA).
  • To compare DDART's performance against established conventional distance vision charts.
  • To assess the test-retest reliability of DDART in different patient groups.

Main Methods:

  • A prospective multicenter validation study was conducted.
  • The distance best spectacle-corrected visual acuity (dBSCVA) was measured using DDART and four conventional charts (ETDRS, Snellen, Landolt C, Tumbling E).
  • Intraclass correlation coefficients (ICCs) were used to assess agreement and test-retest reliability, with a noninferiority margin of 2.5 symbols.

Main Results:

  • 534 participants, including those with normal and low vision, were enrolled.
  • DDART measurements showed excellent agreement with conventional charts, with mean differences within the predefined noninferiority margin.
  • High ICCs (0.848–0.985) indicated excellent agreement, and test-retest reliability was consistently high (ICCs 0.912–0.964).

Conclusions:

  • The Democritus Digital Acuity and Reading Test (DDART) is a valid and reliable digital tool for assessing distance visual acuity.
  • DDART provides accurate measurements comparable to conventional charts for both normal and low vision individuals.
  • Its reliability in clinical and telemedical settings makes DDART a promising option for modern eye care.