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Related Experiment Video

Updated: Dec 29, 2025

Author Spotlight: An Automated Method for Assessing Visual Acuity in Infants and Toddlers Using an Eye-Tracking System

Author Spotlight: An Automated Method for Assessing Visual Acuity in Infants and Toddlers Using an Eye-Tracking System

Published on: March 17, 2023

[Visual acuity assessment: historical overview and current trends].

A N Stulova¹, N S Semenova¹, V S Akopyan¹

¹Lomonosov Moscow State University, Faculty of Fundamental Medicine, 27/1 Lomonosov Av., Moscow, Russian Federation, 119991.

Vestnik Oftalmologii

|February 5, 2020

Summary

This summary is machine-generated.

This review compares the Snellen and Early Treatment Diabetic Retinopathy Study (ETDRS) charts, highlighting the evolution of visual acuity assessment methods used in clinical practice and research.

Keywords:

ETDRS chart Snellen chart logMAR scale visual acuity

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Last Updated: Dec 29, 2025

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Published on: March 17, 2023

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Binocular Dynamic Visual Acuity in Eyeglass-Corrected Myopic Patients

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Published on: March 29, 2022

Area of Science:

Ophthalmology
Optometry
Clinical Research Methodology

Background:

Visual acuity assessment is fundamental in eye care.
Standardized charts are crucial for consistent clinical and research data.
The Snellen chart has been a long-standing standard.

Purpose of the Study:

To trace the historical development of visual acuity testing methods.
To compare the Snellen and ETDRS visual acuity charts.
To evaluate their respective applications in research and clinical settings.

Main Methods:

Literature review of visual acuity assessment techniques.
Comparative analysis of Snellen and ETDRS chart characteristics.
Discussion of chart usage in scientific literature and clinical guidelines.

Main Results:

The Snellen chart, while historically significant, has limitations in precision.
The ETDRS chart offers improved design for more accurate visual acuity measurements.
Both charts remain relevant, but ETDRS is often preferred for research.

Conclusions:

The evolution of visual acuity charts reflects a drive for greater measurement accuracy.
The ETDRS chart provides enhanced precision over the traditional Snellen chart.
Understanding chart differences is vital for interpreting visual acuity data.