Lack of standards for weighting children's charts

Lack of standards for the size of figures in relation to letters – leading to inconsistency across different sight tests and manufacturers. It is an obvious task for ophthalmological organizations and research institutions to investigate widespread symbol optotypes and measure reliable compensation factors. By following a more calibrated and standardized approach, one can ensure that vision tests with symbols…

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ISHIHARA color vision test

Color vision test with the ISHIHARA system The 38 ISHIHARA plates Download the overview: Danish version PDF International version PDF Plate 1 Everyone should be able to see number 12. Plate 2 Normal view: 8 Red-green problem: 3 Plate 3 Normal view: 6 Red-green problem: 5 Plate 4 Normal display: 29 Red-green problem: 70 Plate…

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10 good reasons to replace your old vision chart - watch video

Danish versionNorwegian versionGerman versionEnglish versionDanish version 10 reasons to why we must look at eye charts with new eyes: Norwegian version [ German version English version 10 reasons to why You should replace Your eye charts! STANDARDS ARE NOT FOLLOWED Unfortunately, many existing sight charts on the market do not meet international standards such as ISO 8596. This results…

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What's wrong with the old light box?

What's wrong with "the good old vision chart"? “Why all the fuss? It's just a screening!” "Yes, and precisely that screening determines whether possible vision problems are uncovered and examined for treatment in time." 10 reasons why we must look at vision charts with new eyes: STANDARDS ARE NOT FOLLOWED – Unfortunately, many existing…

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The history of the development of the modern vision test

The history of the development of the modern vision chart Visual acuity-related scales of visual function Measuring visual acuity starts with defining the stimulus parameters: symbol size and viewing distance. The reference standard for size was defined by Snellen; the name "M unit" was coined by Sloan. The standard of reference for distance is the meter and its inverse, the diopter. Based on these parameters, we can describe how the eye…

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Pitfalls in vision testing of children

Pitfalls in Children's Vision Testing Inadequate Testing Environment: Testing in a room with poor lighting or distractions can lead to inaccurate results. Improper Test Distance: Failure to maintain the appropriate test distance can distort results and lead to false positive or negative results. Wrong choice of vision chart: not age appropriate, or use of diagrams with unfamiliar symbols...

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Danish doctors and healthcare providers choose vision charts from Danish ISOeyes!

"Now we must have cleared out the old untrustworthy sight charts which are still hanging in many Danish medical clinics. If nothing else, because the Danish Health Authority has come up with new guidelines that dictate the use of a logarithmic scale.” That's what it sounds like from a large number of doctors and healthcare workers across the country. It feels great when the whole mission took…

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Crowding and horror vacuum

Crowding The world is complex and our vision must distinguish many things from each other, even when they are many and close together. Vision charts are designed with the crowding effect in mind for several reasons, all aimed at ensuring accurate and reliable visual acuity measurements as well as improving the diagnostic process: Representative of real-world situations: In reality, people often experience…

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The Danish Health Authority's guidelines for vision tests

The new guidelines: (Decided, but not yet published) Measurement units and registration are called LogMAR in future: Vision tests on vision charts charts must in future be read and registered with logarithmic values ​​(LogMAR) and not 6/6 or decimal values. Requirements for the visual charts' physical design: 3-6 year olds: The chart must be calibrated for a vision test at a distance of 3 metres. The chart is equipped with…

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How to measure your child's vision with the LogMAR scale

Screening of children – the new limit values ​​for visitation (LogMAR). Normal vision in children and adults is defined as a 6/6 vision or decimal 1.00. The Danish Health Authority's current guidance on "Preventive health services for children and young people" states that children must be referred to an ophthalmologist if the vision test result is worse than 6/9 (or decimal 0.66) in just one of the eyes (monocular). (On a chart designed for…

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Optotypes for children – a science in itself!

Optotypes for children – a science in itself! Vision charts for children in many cases have serious faults. An unregulated market Charts for children are an unregulated market that leads to incorrect, overly favorable vision test results for children, resulting in a lack of visitation and treatment. Unfortunately, it is entirely up to the manufacturer to set the compensation as figure-based…

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Hanging charts with logarithmic scale - an improvement after all!

Charts for hanging from Danish ISOeyes Are there good uniform lighting conditions in the clinic room, so that vision tests can be carried out with a uniform test environment, regardless of whether the sun is shining through the window or not, - yes, you can now acquire vision charts intended for hanging with nails, pins or similar, which comply with the Danish Health Authority's new guidelines. Guidelines that dictate use…

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How to test for both farsightedness and nearsightedness!

It's that simple with vision charts from Danish ISOeyes: With long vision and near vision charts from ISOeyes, you can easily screen for both long vision and near vision by using the two types of charts, the Distance chart and the near vision tester in combination. The two charts are precisely calibrated in relation to each other, so the test only differs in terms of viewing distance. That…

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Especially vision charts for children can still be misleading

It is not only the English figure chart from Kay Pictures which, according to recognized research, gives over-favorable vision test results compared to the reference chart from LandoltC (cf. ISO 8596). This is also the case with the Østerberg chart, which has been widespread in Denmark for decades. "Two out of three children in need of glasses are not discovered during routine checks" - it says...

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CE marking is no guarantee that your eye chart is correctly produced!

CE marking is no guarantee that your vision chart is correctly produced! Vision charts belong to class 1 medical equipment, and for class 1 equipment it is solely up to the manufacturer to indicate whether the product complies with quality requirements and guidelines for correct execution of the vision chart. CE marking is therefore not a guarantee of quality and compliance with…

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Health care in the country's municipalities choose vision charts from Danish ISOeyes.

Health care in the country's municipalities choose vision charts from Danish ISOeyes. In the effort to live up to the Danish Health Authority's revised guidelines with support for a logarithmic scale, healthcare chooses the new innovative vision charts from ISOeyes in large numbers. The charts comply with all international standards and offer a reliable vision measurement environment, unlike in the past, where charts for children were…

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