Spectral radiance of blue light filters on ophthalmic lenses
C. Fernández, M. Agilés, E. Pérez-Cabré, G. Cardona
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Base Information
Volume
V50 - N2 / 2017 Ordinario
Reference
165-172
DOI
http://doi.org/10.7149/OPA.50.2.49072
Language
English
Keywords
Blue light filters, ophthalmic lenses, LED backlight screens, electronic devices, circadian rhythm
Abstract
As a result of the recent improvement in light-emitting diode (LED) technology, the displays of the vast majority of electronic devices are now illuminated by LEDs. There are several advantages of this type of light source over its predecessors; however, recent research is giving support to the fact tha tprolonged exposition to the white LEDs emission in the blue spectrum may have a negative impact onvisual health, as well as, on biological rhythms (circadian rhythms). As a consequence, ophthalmic lens manufacturers have recently introduced in the market innovative lenses that incorporate blue light filters, especially designed for electronic device users. In this work, the performance of different blue light filters present on commercially available ophthalmic lenses was tested and compared. Lenses were placed in front of a LED-based backlight tablet, in a similar way a common user would be reading a text on the electronic device. The absorption characteristics of the various samples from four different ophthalmic lens manufacturers were measured. Analysis of the different samples from thesame manufacturer was conducted and blue light filters from different manufacturers were compared.
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