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Binocular Dynamic Visual Acuity in Eyeglass-Corrected Myopic Patients

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Comparison between Different Visual Acuity Tests and Validation of a Digital Device.

Blanca Montori¹, Teresa Pérez Roche^2,3, Maria Vilella⁴

¹Department of Pharmacology and Physiology, University of Zaragoza, Domingo Miral, s/n., 50009 Zaragoza, Spain.

Vision (Basel, Switzerland)

|September 27, 2024

Summary

This study compared printed and digital visual acuity (VA) tests, finding letter optotypes yielded better VA than symbols. The new DIVE device demonstrated reliable and comparable results to traditional methods.

Keywords:

ETDRS HOTV LEA symbols digital devices validation visual acuity visual testing

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Area of Science:

Ophthalmology
Optometry
Vision Science

Background:

Accurate visual acuity (VA) testing is crucial for diagnosing and monitoring eye conditions.
Traditional printed VA charts and newer digital methods offer different testing modalities.
The Devices for an Integral Visual Examination (DIVE) is a novel device for comprehensive visual assessment.

Purpose of the Study:

To compare the performance of various printed and digital visual acuity tests.
To validate the reliability and accuracy of the DIVE device for VA testing.
To assess the agreement and repeatability of different optotype (symbols vs. letters) and format (printed vs. digital) VA tests.

Main Methods:

Visual acuity was measured in 51 adult participants using standard ETDRS and LEA Symbols charts.
The DIVE device was used to administer HOTV and DIVE Symbols tests.
Agreement was assessed using intraclass correlation coefficient (ICC) and Bland-Altman analysis; repeatability was also measured.

Main Results:

High correlation (ICC 0.95-0.97) and good agreement were found between all tested VA methods.
Slightly higher VA values were observed with DIVE HOTV and ETDRS compared to LEA Symbols and DIVE Symbols.
The ETDRS chart demonstrated the best repeatability, while all DIVE tests showed good reliability.

Conclusions:

The evaluated visual acuity tests, including DIVE, provide comparable results in adults.
Letter optotypes generally yield higher VA measurements than symbol optotypes.
The DIVE device is a reliable tool for visual acuity testing, showing strong correlation with established printed methods.