2013-12-27

eye protection from UV light

12.27: web.med/eye protection from UV light:
ultraviolet radiation's effect on eyes:
Age-related macular degeneration (AMD)
is a leading cause of blindness in the western world.
. short wavelength radiation and the blue light
induce significant oxidative stress
to the retinal pigment epithelium.
Epidemiologic evidence makes an association
between severity of light exposure and AMD,
although causality has not been esblished
[ in fact the major cause of AMD is
the same set of situations that are causing
circulation disorders .]
The cornea and the lens block a major portion of
the ultraviolet (UV) radiation from reaching the retina
(wavelengths of less than 295 nanometers).

so, first on the list of protectives is eyewear:
The origin of Eagle Eyes® began at
NASA's Jet Propulsion Laboratory
to protect eyesight from solar radiation light.
. eagles have unique oil droplets in their eyes
that selectively filter out harmful radiation
and permit only specific wavelengths of light;
NASA replicated this into a lens technology
that, in turn, resulted in Eagle Eyes® eyewear.
. here are the wrap-arounds of various shades .

. a chemical way to filter eye's light
is to get food that has Lutein and Zeaxanthin .

Lutein and zeaxanthin
are found in both the retina's macula
and the lens of the eye;
they act as powerful antioxidants
to filter high-energy blue light.
Lutein and Zeaxanthin are found in
dark green, leafy vegetables
and synergize with what's in egg yolks;
and, finally, they are fat soluble,
so the best way to cook greens,
in order to maximize absorption,
is pureed and simmered in spiced olive oil .

. there is much more to say about
lifestyle changes that prevent blindness .