Description

The 2M 2000 Series ETDRS Chart, known as Chart 2, is an essential tool for standardized visual acuity testing, widely used in both clinical and research settings. As part of the renowned ETDRS® 2000 Series, it plays a crucial role in the Early Treatment Diabetic Retinopathy Study, offering precise and reliable vision assessment.

Key Features

• Sloan Letter Arrangement: Each line on the chart features five Sloan letters, meticulously arranged to ensure equal difficulty and homogeneity. This design is based on comprehensive data from 7,420 eyes in the ETDRS® study, enhancing the accuracy of visual acuity measurements.

• Multiple Chart Versions: The series includes three charts, each with a unique optotype arrangement. This prevents memorization and maintains consistent testing conditions across different sessions.

• Proportional Spacing: The chart employs logMAR proportional spacing, with a geometric progression in letter size, providing a standardized and reproducible measurement of visual acuity.

Design and Compatibility

• High Contrast and Non-Reflective: Crafted from translucent polystyrene or styrene plastic, the chart is designed for use with illuminated cabinets, offering high contrast and a non-reflective surface for clear visibility.

• Versatile Mounting Options: It is compatible with the ETDRS® Illuminator Cabinet, ESV3000™ ETDRS Clinical Trial Standardized Viewer, and ESC2000™ Illuminated ETDRS Clinical Trial Cabinet, allowing for versatile mounting options.

Testing Distances and Acuity Notations

• Supported Distances: The chart supports testing at distances of 2 meters, 2.5 meters, 3 meters, and 4 meters, accommodating various clinical environments.

• Comprehensive Acuity Notations: It displays a wide range of acuity notations, including Snellen, LogMAR, and Decimal, covering measurements from 20/200 to 20/10.

Durability and Maintenance

• Robust Construction: The chart's durable construction includes screen printing and clear coating, ensuring longevity and resistance to wear.

• Easy Maintenance: Maintenance is straightforward, requiring only a soft, dry cloth for cleaning to preserve the print and coating.

Intended Use

Ideal for ophthalmology and optometry clinics, vision research laboratories, and clinical trial settings, the 2M 2000 Series ETDRS Chart provides a reliable and standardized method for measuring visual acuity. Its thoughtful design and comprehensive features make it a valuable asset for professionals seeking accurate and consistent vision testing outcomes.