[Table for assessing visual acuity in children]

Area of Science:

• Ophthalmology
• Optometry
• Vision Science

Background:

• Standardized visual acuity testing is crucial for diagnosing and monitoring vision impairments.
• Landolt rings are a widely accepted international standard for visual acuity measurement.
• Developing alternative or supplementary visual acuity charts is essential for diverse populations and clinical settings.

Purpose of the Study:

• To evaluate a novel silhouette pattern visual acuity table developed in Russia against the ISO standard.
• To determine the correspondence between visual acuity measurements obtained using the silhouette pattern table and Landolt rings.
• To identify silhouette patterns that best mimic the recognition difficulty of Landolt rings for accurate vision assessment.

Main Methods:

• Visual acuity was assessed using the ISO method in 10 adult subjects with 1.0 visual acuity.
• Pattern recognition was evaluated in 22 children aged 3.5-5.5 years.
• Patterns with less than 50% correct identification by children were excluded from the final table.

Main Results:

• Visual acuity assessed by the silhouette pattern table corresponded with Landolt ring results when subjects were familiar with all tests.
• The study identified specific patterns for inclusion in the table based on their similarity to Landolt ring recognition.
• The developed silhouette pattern table demonstrates compatibility with Landolt ring-based visometry.

Conclusions:

• The developed silhouette pattern table, adhering to ISO standards, offers a viable alternative for visual acuity testing.
• Results obtained using the silhouette pattern table are comparable to those from Landolt ring examinations.
• This tool can be effectively integrated into practical ophthalmology for reliable visometry.