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Pitfalls in eye testing of children
Pitfalls in eye testing of children Inadequate testing environment: Testing in a room with poor lighting or distractions can lead to inaccurate results. Incorrect testing distance: Failing to maintain the appropriate testing distance can distort results and lead to false positives or negatives. Incorrect choice of eye chart: Using a chart that is not age-appropriate…
CE marking is no guarantee that your eye chart is correctly manufactured!
CE marking is no guarantee that your eye chart is correctly manufactured! Eye charts fall under medical devices class 1, and for class 1 equipment, it is solely up to the manufacturer to indicate whether the product meets quality requirements and guidelines for the correct execution of the eye chart. CE marking is therefore not…
Doctors and health care choose eye charts from Danish ISOeyes!
“Now we need to clear out the old unreliable vision charts that are still hanging in many Danish medical clinics. If for no other reason, then because the Danish Health Authority has issued new guidelines dictating the use of the Logarithmic scale.” This is the sentiment expressed by a large number of doctors and health…
Get exactly the frame for your eye chart that matches the clinic’s style and image
Make Your Eye Chart Stand Out For a modest additional cost, you can get a chart that fits the style and image of your clinic. Why should everything be white or gray? ISOeyes produces a chart according to your taste, without compromising on quality and standards. For all 4 sizes of LED panels, we can…
Particularly vision charts for children can still be misleading
It is not only the English figure chart from Kay Pictures that, according to recognized research, produces overly favorable vision test results compared to the reference chart from Landolt C (according to ISO 8596). The same is true for the Østerberg chart, which has been widely used in Denmark for decades. “Two out of three…
What’s wrong with our current eye charts?
What’s wrong with our current eye charts? – 10 reasons why it is time to replace – now! STANDARDS ARE NOT FOLLOWED Unfortunately, many existing eye charts on the market do not comply with international standards such as ISO 8596. This results in frequent instances of misleading vision test results and makes it difficult…
Optotypes for Children – A Science of Its Own
Optotypes for Children – A Science of Its Own Eye Charts for Children Often Have Serious Flaws An Unregulated Market The market for children’s eye charts is largely unregulated, leading to inaccurate and overly favorable vision test results for children, which can result in missed referrals and lack of treatment. Unfortunately, it is entirely up…
How to Test for Both Farsightedness and Nearsightedness
It’s That Simple with Eye Charts from Danish ISOeyes: With farsightedness and nearsightedness charts from ISOeyes, you can easily screen for both conditions using the two types of charts: the Distance Chart and the Near Vision Tester in combination. The two charts are precisely calibrated relative to each other, so the only difference in the…
10 good reasons to replace your old eye chart
Video on the multiple advantages of and innovations on the eye charts from ISOeyes! STANDARDS ARE NOT FOLLOWED Unfortunately, many existing eye charts on the market do not comply with international standards such as ISO 8596. This results in frequent instances of misleading vision test results and makes it difficult to compare results across different…
The History of the Development of the Modern Vision Test
Visual Function Scales Related to Visual Acuity The measurement of visual acuity starts with defining the stimulus parameters: symbol size and viewing distance. The reference standard for size was defined by Snellen; the term “M-unit” was coined by Sloan. The reference standard for distance is the meter and its inverse, the diopter. Based on these…
Lack of standards for eye charts for children
Lack of Standards for the Size of Figures Compared to Letters – leads to inconsistency across different vision tests and manufacturers. It is an obvious task for ophthalmological organizations and research institutions to examine widespread symbol optotypes and measure credible compensation factors. By following a more calibrated and standardized approach, it can be ensured that…
Manglende standarder for vægtning af børnetavler
Manglende standarder for størrelsen af figurer i forhold til bogstaver – fører til inkonsistens på tværs af forskellige synsprøver og producenter. Det er en oplagt opgave for oftalmologiske organisationer og forskningsinstitutioner at undersøge udbredte symboloptotyper og udmåle troværdige kompensationsfaktorer. Ved at følge en mere kalibreret og standardiseret tilgang kan man sikre, at synsprøver med symboler…
Crowding and horror vacuum
Crowding The world is complex, and our vision must distinguish many things from each other, even when they are numerous and close together. Eye charts are designed with the crowding effect in mind for several reasons, all aiming to ensure accurate and reliable visual acuity measurements and improve the diagnostic process: Representative of real-world situations:…