Visibility Vol 8 Issue 3


Measuring and Prescribing Optimum Task Light Intensity and Color


While bright task light is known to be important for functional vision, it is challenging to measure and prescribe. A new diagnostic system, the LuxIQ™, has been developed to provide clinicians, researchers and educators with a standard tool to assess lighting needs for near tasks, without swapping bulbs or changing fixtures. It enables quick assessment of near vision performance over a broad range of light levels, color temperatures and colors. The calibrated source is placed over visual acuity charts or reading materials using the individual’s working distance. Clinicians adjust the lux (brightness) and color (°K or nm) to the individual’s need and record the settings. Practitioners can prescribe optimum task lighting in less than 5 minutes, in exam rooms, labs, or during home visits. An accompanying webbased application, LightChooser,™ translates illuminance and color temperature measurements into recommendations for lamps or light bulbs.

Elderly couple under tree smiling

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

Aaron P. Johnson, PhD

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Man using magnifier on glasses

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

Bradley E. Dougherty, OD, PhD

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Elderly man being helped up steps

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

Paymon Rafian; Gordon E. Legge, PhD

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