Description

The LEA Numbers® Low Contrast Flip Chart is an essential tool for professionals seeking to assess visual acuity and contrast sensitivity at low contrast levels. This specialized chart is designed to provide accurate measurements through its unique presentation of numbers, known as LEA Numbers® optotypes, across five distinct contrast levels: 25%, 10%, 5%, 2.5%, and 1.25%.

Key Features

• Multi-Level Contrast Assessment: Each chart comprises five offset pages, with each page dedicated to a specific contrast level, allowing for comprehensive evaluation.
• Versatile Use: Suitable for clinical settings, it serves a diverse range of patients, including children aged 36 months to 7 years and individuals with multiple disabilities.
• Memorization Prevention: Available in two sets with different symbol orders to ensure reliable results by preventing memorization.

Practical Design

The flip chart's dimensions are 9 inches by 3.25 inches (22.9 cm by 8.25 cm), making it convenient for various testing environments. It includes recording forms and a soft-tipped pointer, along with detailed instructions to facilitate effective use.

Usage and Maintenance

• Testing Flexibility: Can be used at various distances, providing adaptability in different clinical scenarios.
• Surface Care: Users are advised to handle the chart carefully, avoiding direct contact with the sensitive surface to maintain its integrity.

Outcomes and Benefits

Results from the chart can be used to plot a contrast sensitivity curve, offering insights into visual function changes that may not be evident in high contrast acuity tests. This makes it a valuable asset for detecting subtle visual impairments.

Certification

The product is CE approved, ensuring compliance with European health, safety, and environmental standards, thus guaranteeing quality and reliability in professional settings.