Precision Vision 2-Metre ETDRS LogMAR Chart (Chart 2 Revised)
Test near-distance acuity with the Precision Vision 2-Metre ETDRS LogMAR Chart (Chart 2 Revised). This revised eye-test chart is designed for testing at a 2 metre distance, and consists of fourteen lines of Sloan optotype with five letters per line, and is ideal for use in optometry clinics, doctor's surgeries, and vehicle licensing authorities.
What's Included?
What Is the Function of This Revised LogMAR Chart?
The logMAR, or ETDRS, test type is designed to assess a patient's vision, usually in regards to visual acuity. The test consists of fourteen lines, each with 5 Sloan optotype letters that decrease in size as they go down the chart. This 2-metre chart design is ideal for measuring near-distance visual acuity, or 'close-sightedness'.
What Does the Chart Being Revised Mean?
There is a slight change in the difficulty score for each of the Sloan letters in revised ETDRS charts. These revised scores derive from the visual acuity examinations of the 7420 eyes during the ETDRS study in which this specific type of logMAR chart was developed.
These revisions also involved the arrangement of the letters being changed to prevent patients from memorising and guessing the order of letters. Revised logMAR charts, including this model, are not suitable for use in studies sponsored by the American National Eye Institute.
Key Features and Benefits
- LogMAR ETDRS chart for vision tests
- Ideal for measuring near-distance visual acuity
- Perfect for use by optometrists, doctors, and vehicle licensing authorities
- Designed for tests conducted at a 2 metre distance
- Revised chart design features a change in difficulty scores and letter arrangement
- Each of the ten letters are presented at least once in each position
Alternative Eye Test Chart
If you would prefer an un-revised ETDRS logMAR chart for use during clinical trials or low-vision testing, there are some great alternatives available! This includes:
