Page 53 - TOKAI Lens Catalogue revised

LUTINA-Reduce Damage, Help Your Eyes

*The “LUTINA ” includes a small amount of color to advance
the capability of cutting the short wave length lights. The tone
may look different accor ding to light sources.

〈Eyes without the “LUTINA”〉 〈Eyes with the “LUTINA”〉

Damages Caused by Damages Caused by
Oxidative Stress Oxidative Stress

Lutein Lutein

Light Light

一般的なレンズを装用した場合 ルティーナを装用しつづけた眼
Low amount of “Lutein”, thus not able to Enough amount of “Lutein”, thus able to
reduce the damage to the macula. reduce the damage to the macula. *Images for Reference

The HEV (400-420nm) Rays which
Damages the "Lutein" and Causes Stress
*HEV … High Energy Violet Light
Transmittance (%) Standard (Cuts out more than 2 times more HEV than

Cut
UV Cut
Lenses
standard UV Cut Lenses)
*Standard UV Cut Lenses cut out 45%
“LUTINA”
LUTINA cuts out 94% of the HEV to for
long the Lutein within the eyes, thus
protects the eyes itself.
Light Waves with High Energy
Wave Length (nm) *Index 1.60 / S -0.00 / CT 2.0mm

To maintain a healthy life, it is important to reduce Wearing lenses may save the eye’s health just like
the stress of the eyes. taking supplements.
According to recent studies, it was shown that HEV light (High Energy Many eye disorders and the aging of the eyes are believed to be the caused
Violet light) can cause oxidative stress within di?erent layers of the retina by reactive oxygen , more specifically the singlet oxygen and the oxidative
- especially the photoreceptors and pigment epithelial cells. The group of stress caused by it. From studies, this singlet oxygen is known to be
Funk (2011a) showed in standardized laboratory experiments by cell accelerat-ingly produced due to the UV-rays and the high energy light
culture that neuronal retinal cells react after exposure to short wave waves. The lutein is a substance that restrains the oxidative stress caused
length light of 411nm with much higher stress and signs of beginning cell by this singlet oxygen. Not only so but, a body waste called the lipofuscin
death (apoptosis) than after impingement of 470nm light. Furthermore, builds up inside the retinal pigment epithelium as the aging of the eyes
the Funk (2011b) group demonstrated that after exposure to 411nm light proceed. This lipofuscin acts as a sensitizing agent and accelerates the
the retina gets distorted.These events can also happen in the human retina production of singlet oxygen. The lipofuscin has a characteristic to absorb
as one of the factors which accelerates the development of Age-related more light as the light as the light waves gets shorter as of the figure. By
Macular Degeneration (AMD) evidenced by cell culture and animal studies cutting out the lights around the area, it is possible to e?ectively restrain the
(Wu et al. 2006, Jarett and Boulton 2012). Also a recent in vitro study production of the singlet oxygen, thus can reduce the reduction of lutein
demonstrated production of radical oxygen species, DNA damage and within the retina. The lutein its self is a pigment that absorbs the UV - Blue
initiation of cell death in lens epithelial cells, which can lead to the formation wavelength lights, so by reducing the lights near this wave length, it is
of cortical cataract, after imingement of short wavelength light (Xie et al possible to reduce the destruction of it directly as well. “LUTINA” cuts out of
2014).Thus it is very useful to block HEV light of 400nm - 420nm, because course the UV-rays like as other lenses but in addition it cuts out light waves
the light can trigger harmful processes in the eye. from 400-420nm. 400-420nm are the wave length that both the lutein and
lipofuscin absorbs, thus by cutting theses light waves out, the “LUTINA” can
reduce the oxidative stress and also reduce the damage to the lutein.
This area of wave
Fig. 1） Determination of cell length is actually lights
that are not so sensitive
stress (nuclear fragmentation so cutting these lights
-sub G1-DNA content, a hallmark will not e?ect the Saga
dean rhythm which is
of apoptosis) after irradiation with becoming a popular
di?erent light wavelengths. After subject, and more over
the color on the lenses
24 h irradiation with 411 nm light will be natural. Wearing
of 4.5 W/m2 irradiance, the “LUTINA” can easily be
percentage of damaged cells done daily for the eyes
health care just like
increased significantly compared taking supplements.
with the other controls by animal
study.
TOKAI OPTICAL CO.,LTD.