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Old 25-07-2019, 12:26 PM   #5917
EyezoneOpticalSG
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Join Date: May 2018
Posts: 207
okay..
may i know the reason behind the particular brand recommendation?
Not doubting your recommendation, but i dont do much spectacles shopping, and the few brands im only familiar with are carl zeiss, hoya, and crizal.

Even then within this 3 brands, i dont know which is superior.
So will like to understand better.
Hi!

Thats the only brand with HEV(Blue) Absorb (~94% filter) technology built into the material + changes colour under the sun, while the rest(Essilor, zeiss, hoya) depends on a layer of blue coating on the lens surface to reflect away up to 30% HEV(Blue) light.

In terms of value for money & good protection, Kodak Evoblue would be recommended.


Quick illustration of the difference between Blue reflect & Blue absorb

Light Spectrum (Left side of chart being most harmful to humans):


Blue Reflect lenses block up to 30% across whole blue spectrum (~400-500nm)


Blue Absorb lenses block up to 94% of the high energy waves(up to 420nm), while letting the rest of beneficial blue light in.(~420-500nm)


disclaimer: straight lines are drawn to make it easier for me to draw :X Actual lines are not as straight as what is illustrated
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