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The Spectacles Thread. - Part 2

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Old 08-07-2019, 03:52 PM   #5836
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I've come up with some drawings to let more bros better understand what is UV/ 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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Old 08-07-2019, 08:41 PM   #5837
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Photochromic is the term for colour changing lenses.
Transition is one of the brands of photochromic lenses.


Many brands sells photochromic lenses.

But if you need photochromic + HEV(Blue) light filter, can choose kodak/asahi
Is there a way to know if a brand is indeed using transition len, like an authentication card or something? I made mine from xxxxx and it sucks...the color merely changes to light grey as compared to my other authentic lens which turns dark very quickly. Am i being conned already?

Im pretty unhappy with that brand because it was marketed as transition to me and the sales people didnt even correct me that its photochromic.

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Old 08-07-2019, 09:36 PM   #5838
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For Strong HEV filter, always choose Tokai, Asahi or Kodak
Never heard of first two lol. But am surprised with kodak quality. I sent one frame for crizal prevencia see how is it. Am thinking of getting another for home use.

Is zeiss photofusion good for outdoor?
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Old 08-07-2019, 10:39 PM   #5839
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Made a pair of spectacles in Tokyo. They used stock lenses which was why I could collect it almost immediately. Also mentioned they use Nikon Essilor lenses. Any indication these are Nikon Essilor as I don't see any branding at all? Dosen't help that the back is in Japanese I know...
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Old 09-07-2019, 12:33 AM   #5840
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I've come up with some drawings to let more bros better understand what is UV/ Blue Block/ Blue Filter

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



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



Blue filter blocks 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
Seems like filter lens is better, is there a reason why the big brands use blue coating instead?

Posted from PCWX using Nachtsider, renowned Michelin balut inspector & Jollibee connoisseur
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Old 09-07-2019, 04:52 PM   #5841
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I am searching for transition lens and wonder how essilor crizal transtion xtrative performance?
is transition lens can be make with high degree prescription?
How long can a transition lens last with proper care?
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Old 09-07-2019, 05:22 PM   #5842
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I am searching for transition lens and wonder how essilor crizal transtion xtrative performance?
is transition lens can be make with high degree prescription?
How long can a transition lens last with proper care?
YouTube got video comparing..
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Old 09-07-2019, 06:41 PM   #5843
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Hello, intend to get my eyes checked as I am having difficulty seeing from far.

Which is a better place to have my eyes checked? Ngee Ann Poly Optometry Centre or Singapore Poly Optometry Centre?
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Old 09-07-2019, 07:09 PM   #5844
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Hello, intend to get my eyes checked as I am having difficulty seeing from far.

Which is a better place to have my eyes checked? Ngee Ann Poly Optometry Centre or Singapore Poly Optometry Centre?
Both are equally fine. Just see which is more convenient for you!
It is a full comprehensive check so know that it will take longer than the usual eye tests in optical shops.
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Old 10-07-2019, 12:53 AM   #5845
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Which is better for single vision stock lens?




nulux ep 1.67 double aspheric

vs

nulux classic 1.74 aspheric


Posted from PCWX using Nachtsider, renowned Michelin balut inspector & Jollibee connoisseur

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Old 10-07-2019, 01:34 AM   #5846
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Which is better for single vision stock lens?




nulux ep 1.67 double aspheric

vs

nulux classic 1.74 aspheric


Posted from PCWX using Nachtsider, renowned Michelin balut inspector & Jollibee connoisseur
Depending on your Prescription and the Size of your frame. If based on lens type, Nulux Ep will be better.
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Old 10-07-2019, 11:25 AM   #5847
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Seems like filter lens is better, is there a reason why the big brands use blue coating instead?

Posted from PCWX using Nachtsider, renowned Michelin balut inspector & Jollibee connoisseur
No idea though

Maybe because the company that created this UV420 is a japanese company?
http://uv420cut.com/feature/
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Old 10-07-2019, 11:47 PM   #5848
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Hmm

I believe this is the correct one


let me know which of our branches is the most convenient for you?
Blk 184 Toa Payoh Central #01-366 S(310184)
Blk 143 Teck Whye Lane #01-233 S(680143)
Blk 101 Yishun Ave 5 #01-97 S(760101)
Blk 213 Bedok Central #01-127 S(460213)
Blk 301 Woodlands St 31 #01-259 S(730301)

I can arrange to have it sent there. You can just drop by and my staff will fix for you. No charges
Just replied to your PM.So sorry, didn't see your message

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Old 11-07-2019, 08:41 PM   #5849
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Have been using many type of transition lens but i find hoya sentivity the best. Any idea where got good lobang for this?
Hoya coating i find the best against scratches!!
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Old 11-07-2019, 08:43 PM   #5850
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Anyone knows where can i get hoya sentivity at good price? I find hoya quality is so much better compare to excellor and crizal
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