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…
