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! 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…
What Are the Advantages of Switching to Using the Logarithmic Scale as a Measurement Unit in Vision Tests? A LogMAR Eye Chart (Logarithmic Minimum Angle of Resolution) is designed to enable a more accurate measurement of visual acuity than other methods. If vision test results are to be consistent and comparable, health authorities recommend the…
Screening of Children – the New Thresholds for Referral (LogMAR). Normal vision in children and adults is defined as 6/6 vision or decimal 1.00. The Danish Health Authority’s current guideline on “Preventive Health Services for Children and Adolescents” states that children should be referred to an ophthalmologist if the vision test result is worse than…
Here you can view, download, and print practice charts for children, and we recommend showing them to the child/test subject before the actual test on the vision chart. We have created practice charts for the 3 types of Optotypes: Eyekey, Similar, and Wekey. Eyekey Eyekey Download PDF – versions Eyekey-swedish Eyekey-spanish Eyekey-norwegian Eyekey-italian Eyekey-german…
1 ON TURN ON THE VISION CHART 2 OFF TURN OFF THE VISION CHART 3 INCREASE BRIGHTNESS PRESS TO INCREASE BRIGHTNESS STEPWISE 4 DECREASE BRIGHTNESS PRESS TO DECREASE BRIGHTNESS STEPWISE 5 WARMER LIGHT PRESS AND HOLD TO SWITCH TO WARMER LIGHT 6 COOLER LIGHT PRESS AND HOLD TO SWITCH TO COOLER LIGHT 7 NIGHT MODE…
Place the Eye Chart Correctly to Get Accurate Vision Test Results If all eye charts were calibrated the same and had the same dimensions, and we humans were all the same height, a vision chart could always be placed at the same height and distance from the test subject, whether a child or an adult,…
“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…
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…
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? – 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 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…
Individualized Testing Distance? – We’ve Got You Covered! If the best placement of the patient in the clinic room is 3.5 meters from the eye chart, why not have an eye chart solution calibrated for testing at that exact distance? This way, no post-test calculations are needed. The measurement results will be accurate! At…
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…
Engelsk versionTysk versionDansk versionNorsk versionEngelsk version 10 reasons to why You should replace Your vision charts! Tysk version Dansk version 10 reasons why we must look at eye charts with fresh eyes Norsk version [ STANDARDS ARE NOT FOLLOWED Unfortunately, many existing eye charts on the market do not comply with international standards such as…
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…
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 the number 12. Plate 2 Normal vision: 8 Red-green deficiency: 3 Plate 3 Normal vision: 6 Red-green deficiency: 5 Plate 4 Normal vision: 29 Red-green deficiency:…
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…
