Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Yellow Glasses To Save Vision

03.09.2004


Blue light destroys certain structural elements in the eye, as was revealed by the Russian research team. The mechanism of this effect was studied, and protective measures were offered. The work was supported jointly by the Russian Foundation for Basic Research (RFBR) and the Foundation for Assistance to Small Innovative Enterprises (FASIE), project no. 02-04-08012.



Frankly, the results arising from the long-term study conducted by the team headed by Academician Michael Ostrovsky are rather upsetting. Blue colour of the sky, sea, blue shadows on the snow, radiant blue of thaw water puddles in spring - all that turns out to be bad for our eyes. Probably, dazzling glow of blue diamonds and sapphires is harmful too, though this influence is not very widespread.

In essence, the scientists have revealed the following. Firstly, they observed the effects of main spectral components of white light on eye structures at the cellular and molecular levels. Then, it was revealed that the light is not only an information source, but also quite a powerful destructive agent.


Some cells of the retina and pigmented epithelium generate free radicals upon irradiation by certain rays of the spectrum. Those structures of the eye are absolutely indispensable for normal vision, but they degrade with aging. Free radicals are highly aggressive and chemically attack healthy cells of the eye often causing irreversible changes to them. A combined effect of free radicals and oxygen is even more harmful: essential eye cells either undergo oxidation, or become glued together by chemical bonds, or get immobilized, or get damaged in some other way.

One may suppose that some natural mechanism for protection from such kinds of light-induced damages should exist, since the eye developed in course of evolution under relatively stable conditions of lightening. The research has proved that, actually, there are three protective mechanisms.

Primarily, this is the lens. It normally is somewhat yellowish, hence extinguishing the most part of ultraviolet and shortest waves of the visible spectrum. Secondly, directly behind the pupil is a small yellow-coloured spot on the retina that is the area of greatest visual perception and also another natural colour filter. And, finally, the third protective structure is the pigmented epithelium.

As a result of such a "triple extinguishing", the major portion of blue light that is most harmful for the retina is filtered. With aging, the natural protective mechanisms weaken and fail to perform properly. In case of a disease of the retina, irreversible damages caused by blue light are especially dangerous. In such a situation, the scientists propose certain aid for the eyes.

Knowing the wave lengths particularly harmful for eyes, the researchers designed special glasses that are analogous to the natural colour-filtering structures of the eye. Such glasses have an amber colour, from light to dark yellow, depending on the intensity of sunlight and the degree of eye damage.

It is curious that such glasses not only protect eyes, but also strengthen the vision. This phenomenon is familiar to professional photographers that often use yellow colour-filters in order to obtain a more precise image.

Project Manager Michael Ostrovsky told our correspondent that his team in co-operation with colleagues from the Upper Volga Company have made two trial series of glasses and performed their technical testing. By the present time, they have completed the design of medicinal colour-filtering glasses for retina dystrophy patients and colour-contrast glasses to be prescribed in case of significant loss of vision. Clinical tests will be performed in the nearest future. Both inventions are now assessed by experts from the Committee for New Medical Equipment of the Health Ministry of Russian Federation. The inventors are sure that such glasses should be available for all people.

Sergey Komarov | alfa
Further information:
http://www.informnauka.ru

More articles from Physics and Astronomy:

nachricht Shape matters when light meets atom
05.12.2016 | Centre for Quantum Technologies at the National University of Singapore

nachricht Climate cycles may explain how running water carved Mars' surface features
02.12.2016 | Penn State

All articles from Physics and Astronomy >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Shape matters when light meets atom

Mapping the interaction of a single atom with a single photon may inform design of quantum devices

Have you ever wondered how you see the world? Vision is about photons of light, which are packets of energy, interacting with the atoms or molecules in what...

Im Focus: Novel silicon etching technique crafts 3-D gradient refractive index micro-optics

A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.

Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...

Im Focus: Quantum Particles Form Droplets

In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.

“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...

Im Focus: MADMAX: Max Planck Institute for Physics takes up axion research

The Max Planck Institute for Physics (MPP) is opening up a new research field. A workshop from November 21 - 22, 2016 will mark the start of activities for an innovative axion experiment. Axions are still only purely hypothetical particles. Their detection could solve two fundamental problems in particle physics: What dark matter consists of and why it has not yet been possible to directly observe a CP violation for the strong interaction.

The “MADMAX” project is the MPP’s commitment to axion research. Axions are so far only a theoretical prediction and are difficult to detect: on the one hand,...

Im Focus: Molecules change shape when wet

Broadband rotational spectroscopy unravels structural reshaping of isolated molecules in the gas phase to accommodate water

In two recent publications in the Journal of Chemical Physics and in the Journal of Physical Chemistry Letters, researchers around Melanie Schnell from the Max...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

ICTM Conference 2017: Production technology for turbomachine manufacturing of the future

16.11.2016 | Event News

Innovation Day Laser Technology – Laser Additive Manufacturing

01.11.2016 | Event News

#IC2S2: When Social Science meets Computer Science - GESIS will host the IC2S2 conference 2017

14.10.2016 | Event News

 
Latest News

NASA's AIM observes early noctilucent ice clouds over Antarctica

05.12.2016 | Earth Sciences

Shape matters when light meets atom

05.12.2016 | Physics and Astronomy

Researchers uncover protein-based “cancer signature”

05.12.2016 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>