BONA CE сертификация с зеленым покрытием 1 56 синий блок оптических линз

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Products Description




Refractive index
1.56
Diameter
65/70MM
Monomer
NK55
Transmission
97%
Abbe value
42
Specific gravity
1.15
Coating
SHMC/HMC
Guarantee
2-3 years
UV level
420


Stock power range
Diameter
Spherical
Cylinder
65MM
+0.25~+6.00
0.00~-2.00
70MM
0.00~-8.00
0.00~-2.00




What is blue light?
Blue light is a form of visible light with a wavelength in the range from 380nm to 500nm. It has a very short wavelength, and so produces a higher amount of energy. Studies suggest that over time exposure to the blue end of the light spectrum could cause serious long-term damage to eyes.




The highest energy in the visible light, Can directly reach to the retina. Not only can cause chronic injuries to the eyes of macular, but make the person's eye fatigue acidity. Will cause cataracts, glaucoma and other eye diseases.






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