Optometrist
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Thank you for the info, it is very informative. It seems like I need to go for the Occupational lens. Is that a progressive lens? Can I use it to read books?
How to choose on the coatings, the "Blue reflect lens or the Blue absorb lens"? How much will that be?
Thank you once again.
Occupational lenses are similar to progressive in that it has different zones.
Main difference of Occupational lenses
- no distance prescription (Intermediate & near only)
- at least 30% increase in usable area across horizontal plane
If your eyes are sensitive to bright light/ previously already using blue reflect, choose blue reflect
Otherwise, Blue absorb would be a good to have.
Have to see which kind of protection. Blue Absorb vs blue reflect.
Blue light bandwidth is from ~401-500nm.
The higher energy band (~401-420nm Just after UV400) is the one that is found to cause damages to the eyes, according to research done by Prof. Dr. Richard H.W. Funk & Prof. Dr. Amane Koizumi. https://www.tokaiopt.com/en/html/lutina/
The biggest blue light source is the Sun, subsequently would be light emitting devices when indoor
With that I'ld say blue absorb is a good to have as it provides more protection over the standard uv400 lenses. Whereas, Blue reflect is more for people who want to reduce light brightness.
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). These lenses have an almost not noticeable yellow tint.
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Blue Reflect lenses block up to 30% across whole blue spectrum (~400-500nm) & are generally much yellowish.
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