C – Near Vision and Reading

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Frequently Asked Questions: Visual Functions and Functional Vision Why should I use a reading test? How can I judge the imaging range of various presbyopia corrections? What is the best print size notation for Reading tests? What is the best layout for Reading tests? Visual Functions and Functional Vision At this point we need to … Continue reading C – Near Vision and Reading

D – Contrast Sensitivity

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Frequently Asked Questions: What is contrast sensitivity, why is it important? What is the Contrast Sensitivity Curve? What are the Colenbrander Mixed Contrast cards? What is contrast sensitivity, why is it important? Visual acuity measures the ability to recognize small objects with high contrast.  Often however, the visibility of objects in our environment is limited … Continue reading D – Contrast Sensitivity

E – Low Vision Tests

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Frequently Asked Questions: What is Low Vision? How do we categorize Low Vision? How do we measure letter chart acuity for low vision patients? How do we measure reading acuity for low vision patients? How do I use the Modified Snellen Formula for reading tests? What is Low Vision? Low vision is not a single … Continue reading E – Low Vision Tests

F – Pediatric Tests

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Frequently Asked Questions: What symbols should be used? What is the effect of “crowding”? What is the preferred distance? Behavioral tests (preferential looking) What symbols should be used? Recognition of letters and numbers is not trivially easy for young children.  Using these symbols may underestimate their acuity by measuring a combination of acuity and cognitive development. A simplified chart … Continue reading F – Pediatric Tests

The Jaeger Notation Debate

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To Jaeger or Not to Jaeger, That is the Question When Jaeger published his notation print samples in 1856 little did he know that they would cause a debate that still generates differing views today. In this article we present the views against the use of Jaeger notations as written by world renowned Low Vision … Continue reading The Jaeger Notation Debate