Thursday , October 21 2021

More health for our eyes: they invent a filter that "explores" the harmful blue light of the screens



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The eyes receive more and more stimuli from the electronic objects. Scientists work to counteract the effects of both so-called blue light tablets and cell phones

The Fernández-Vega Institute of Ophthalmology (IOFV), the Foundation for Ophthalmological Research (FIO), the Technological Institute of Materials of Asturias (ITMA) and the University of Oxford published in the scientific journal & # 39;Optical Materials& # 39; a work that analyzes the benefits of a filter that not only blocks harmful light, as it does so far, but also turns it into beneficial light for the retina.

The goal? The discovery can be used to design "lenses neuroprotective and therapeutic for patients with glaucoma and age-related macular degeneration (AMD). "The key would be to take advantage of the" red light "that would not be as harmful as blue.

Light blue vs. Red light

According to Professor Neville N. Osborne and Dr. Susana del Omo, leading researchers at FIO, unfiltered blue light interacts with certain pigments present in the retina, be able to damage it. On the contrary, red light stimulates tissues and has the potential to to contradict these damages. Therefore, it has been hypothesized that the modulation of the amounts of red light could be beneficial for certain patients.

The difference with the filters so far. Dr. Amador Menéndez, ITMA scientist and lead author of the article, explained: "The use of filters is not new in ophthalmology, but until today, filters have been used purely absorbent (which blocks the light and loses it in the form of heat) or photonic crystals (which reflect the light of certain wavelengths).

"With this new type of filter – known as luminescent filters – we obtain a spectral redistribution of light with a double potential effect: neuroprotective (blocking harmful blue-UV light) and therapeutic (providing extra amount of red IR light, which stimulates the regeneration of retinal cells), "says the nanophotonics expert.

New glasses

This filter can be incorporated into the lenses, without significantly altering the quality of vision. The ophthalmologist and researcher Andrés Fernández-Vega Cueto-Felgueroso pointed out that this research was born with the idea of ​​offering added value to the current treatments.

The investigations were carried out in the framework of the project "Retinet: Development of luminescent nanomaterials for neuroprotection and pathological nanopathology in experimental model of retinal damage by light ".

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