Visibility Vol 15 Issue 2, 2021

High Plus Lens Power Measurement Reliability in a Clinical Low Vision Setting

Magnifiers can be specified by magnification (M) or equivalent power (Fe). When comparing these two, Fe is the only independent and constant descriptor and therefore preferred in low vision practice. Yet, Fe in high plus lenses cannot be easily nor reliably measured with a clinical instrument, such as a lensometer. This study looks for the shortest possible distance under which unknown high plus lenses/magnifiers can be measured and still yield clinically acceptable Fe values.

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Quantifying Emotion Recognition and Classification in Clients with Age-Related Macular Degeneration

Aaron P. Johnson, PhD

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Characteristics of Older Bioptic Drivers: Effects of Increasing Age on Driving Safety

Bradley E. Dougherty, OD, PhD

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Using Remote Sighted Assistants to Identify the Location and Orientation of Visually Impaired Pedestrians

Paymon Rafian; Gordon E. Legge, PhD

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