The new guidelines:
Measurement units and recording are now referred to as LogMAR:
Vision tests on eye charts must be read and recorded using logarithmic values (LogMAR) and not 6/6 or decimal values.
Requirements for the physical design of the eye charts:
For children aged 3-6:
- The chart must be calibrated for vision testing at a distance of 3 meters.
- The chart is equipped with figures (not filled symbols) or simple letter charts (HOTV or E).
- Each line contains up to 5 symbols, but exactly 5 symbols are required from the LogMAR 0.5 line (3/6) and below.
- On each line, the distance between symbols must be the same as the symbol height.
- The distance between lines must be the same as the symbol height on the line above.
- The symbols on the entire chart thus form an inverted pyramid with increasingly shorter lines.
School children:
Same requirements as for children aged 3-6.
- However, charts calibrated for vision testing between 3 and 6 meters are allowed.
- The symbols on the charts are letters, numbers, Tumbling E, or Landolt C.
ISOeyes charts fully comply with Health Authority’s guidelines.
The charts are CE/MD approved and also comply with all requirements of the internationally adopted ISO 8596 standard for the construction of eye charts.
ISOEyes offers energy-saving LED charts with remote control in 4 sizes and supports all test distances between 2.5 meters and 6 meters. Additionally, a wide range of optotypes (symbols on the charts) is offered, ensuring that all test environments for adults, preschool and school children, illiterates, etc., are supported.
Here is just one of the ISOeyes charts – a 3-meter chart on a 45×45 cm panel.
Click on the image of the chart to view it in a larger size. Note that both Fraction (6/6), decimal, and LogMAR values are listed on the chart. This facilitates understanding and the transition to the new measurement units. The red line marks the normal vision level LogMAR 0.0 (equivalent to 6/6 or decimal 1.0).
Manuals & Guidelines
Here you will find useful information about Health Authority guidelines and how to conduct a premium vision test.
Logmar explained
Get informed about the new unit of measurement – and why the use of a logarithmic scale is an important step towards more accurate and comparable eye tests.
Health Authority’s guidelines for vision tests
Here you will find the Health Authority’s guidelines for vision tests, including LogMAR and the “inverted pyramid structure.”
How to measure your child’s vision using LogMAR
Screening of children – the new threshold values for visitation (LogMAR).
Crowding Effect! – Understanding the inverted Pyramid Structure
-and the benefits of the combination eye chart!
Transition from old measurement units to LogMAR
We make the transition easier for you… ISOeyes eye charts are equipped with four ways to read the vision test results: fraction, decimal, LogMAR, and VAR score.
Innovative thinking and unprecedented possibilities
to get exactly the eye chart that suits your needs!
Explore your many new options to find exactly the eye chart you need!
How high should the eye chart be placed on the wall?
The optimal placement of ISOeyes eye charts on the wall – for the most accurate vision test results.
What’s wrong with the old eye chart?
Learn why it’s high time to replace the eye chart – and comply with the Health Authority’s guidelines.
Choose the right optotypes/figures for your child’s vision test.
Optotypes for children – a science of its own. Choose correctly and obtain comparable vision test results.
Get an eye chart calibrated to the distance that suits you and your clinic room.
Eye charts shouldn’t be set for 6 meters when your clinic room is only 4.40 meters deep. Avoid converting distances or using mirrored charts. Get a chart calibrated precisely to the desired distance.
Wood look or color? Eye charts that match your clinic’s profile…
Choose from 4 types of wood finishes and a million colors for the frame of your eye chart.
The remote control adjusts brightness and color temperature.
Get familiar with the options available with the included remote control.
Practice charts for children – Print or on tablet
ISOeyes offers free practice charts for figure-based eye charts to ensure that the child understands the figures.
