Precision Vision 4-Metre ETDRS LogMAR Eye-Test (Chart R Original)

The Precision Vision 4-Metre ETDRS LogMAR Eye-Test (Chart R Original) is a quality eye-test chart designed for visual acuity testing at a 4 metre distance, low vision assessments, and use during a range of clinical studies. This chart provides repeatable and accurate results, and is ideal for use by eyecare specialists and vehicle licensing agencies. The chart has a visual acuity range of 40m - 2m.

What's Included?

• 1 x Eye-Test Chart

What Is the Function Of the Eye-Test Chart?

This ETDRS logMAR eye chart is a popular eye-test type designed for visual acuity testing at a 4 metre distance, and low vision assessment. The original design of this chart also makes it suitable for use in clinical studies sponsored by the American National Eye Institute

Key Features and Benefits

• ETDRS logMAR type eye-test chart
• Ideal for visual acuity tests and low vision assessments
• Can be used in clinical studies sponsored by the American National Eye Institute
• Perfect for use by optometrists, other eyecare specialists, and vehicle licensing agencies
• Designed for visual acuity testing at a 2 metre distance
• Offers accurate and repeatable results for visual acuity tests
• Lines are of equal difficulty and geometrical progression
• Has an acuity range of 40m - 2m
• Will fit specific Precision Vision illuminated eye-test cabinets (sold separately)

Original Versus Revised LogMAR Chart Designs

For this brand and style of chart, there are both original and revised options available. Differences between these two options include:

• Original designs are suitable for use in clinical studies sponsored by the American National Eye Institute, revised designs are not
• Only the original design is suitable for low-vision assessments
• Revised and original designs use the same letters, but present them in different orders
• Revised designs use a slightly different letter-difficulty scoring system, based on a ETDRS study that involved the assessment of 7420 eyes