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Engineering Commons

Open Access. Powered by Scholars. Published by Universities.®

2019

Operations Research, Systems Engineering and Industrial Engineering

Series

Blue light

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Full-Text Articles in Engineering

Effects Of Light Illumination On Ocular Responses And Visual Comfort, Shun-Nan Yang, Manho Jang, Jim Sheedy, Yeokyung Seo Jan 2019

Effects Of Light Illumination On Ocular Responses And Visual Comfort, Shun-Nan Yang, Manho Jang, Jim Sheedy, Yeokyung Seo

VPI Research

Background: Artificial light sources such as Light-emitting Diode (LED) emit more intensive blue light (460 to 490 nm) and are with a wavelength distribution deviating from the peak wavelength of 550 nm in natural sun light. The present study examined how cold and warm LED lamps with high- and low-blue light emission differently affected objective ocular responses and subjective viewing symptoms. Methods: 34 adults with normal or correct-to-normal vision read printed continuous text with one of three lamps (LED 4000 K, LED 6500 K and OLED 4000 K) generating 50 and 110 Nits for 60 mins respectively while their pupil ...