The visible light and the electromagnetic spectrum
When a beam of white light, by the sun, passes through a prism is split into different colors (corresponding to the different frequencies of light) forming the spectrum. Violet, indigo, blue, green, yellow, orange and red are the colors visible from the human eye composing the "visible spectrum"; but the light extends for a much wider range of frequencies. At higher frequencies, above the violet, we have: the ultraviolet, X-rays and gamma rays. At lower frequencies, beyond the red, we have infrared and the wide spectral region of radio waves. The visible light, therefore, is that part of the electromagnetic spectrum that impresses the visual organ, but it just takes a small part.
The Blue light
Particular attention should be paid to "blue part" of the spectrum (The blue light rappresents a particular form of electromagnetic radiation, of the visible spectrum, short-wavelength, between 380 nm and 500 nm) that may have, at the same time, effects damaging at the human eye and positive health effects. If the radiation is major than 460 nanometers, it is defined as "good blue light", below of such lengths, instead, is defined as "bad".
The "good blue light" has a fundamental function in the biological clock sync and acts on cognition, memory, sleep and on attention, through action on the retina.
The harmfull blue light
Below 460nm, the blue light becomes highly dangerous for the 'human eye. It is, further, the large amount of blue light (not natural) emitted by electronic and digital devices, LCD and LED (such as display, TV, tablet, computer, etc) and interior lighting devices.
Harmful effects of blue light
Overexposure to light blue can 'give insomnia, irritability', attention declines and major ocular pathologies, such as:
- DRY EYE
- IRRITATIONS, PHOTOPHOBIA
- CONJUNCTIVITIS CHRONIC
- MACULAR DEGENERATION
Ultraviolet radiation are emitted from the sun or from artificial sources such as tanning beds or sun lamps. They are invisible and imperceptible but can severely damage eyes and skin.
Among the ocular pathologies:
- EYELID CANCER
- BURNING AND TEMPORARY
- BLINDING INDUCED BY RAYS UV
- MACULAR DEGENERATION
The solution: SAFER®
The damages caused by UV ray can be avoided wearing suitable medical devices.
SAFER is the "shield" lens that even if it is white, guarantees an high protections up to 420 nm, filtering 28% of the blue light and 55% of the harmful blue light.
The lens acts as a real screen that rejects much partre of harmful blue light completely protecting the eye.
|HIGH PROTECTION UP TO 420 NM|
|REJECTS MOST LIGHT BLUE DAMAGED|
|PROTECTS THE EYE AS A SHIELD|
|SAFER IS A WHITE LENS|
|BLOCKS 100% OF UVB AND UVC RAYS|
|BLOCKS 99% OF UVA RAY|
|FILTERS 55% OF HARMFUL BLUE LIGHT|
|ALLOWS TO PASS THE GOOD BLUE LIGHT|
|FILTERS 28% OF BLUE LIGHT|
|GUARANTEE CLEAR VISION|
Who can use it
- CHILDREN: to protect their eyes at a delicate stage of growth
- YOUNG PEOPLE: that use a lot the electronic devices
- ADULTS: to a daily protection
- SENIOR CITIZENS: as preventive use