The Spectacles Thread.
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sacredsoul
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I think 1.6. Polycarbonate not 1.67 right? Specs arriving on thursday then shall post pics
AlphaAV
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icic okieI think 1.6. Polycarbonate not 1.67 right? Specs arriving on thursday then shall post pics
will be looking 4ward 2 it =D
swami1959
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Choosing Eyeglass Lenses: By Material
Found the article here
http://www.refractivesource.com/patients/alternatives/glasses/lenses-material.htm
Choosing Eyeglass Lenses: By Material
Plastic versus glass lenses
Glass is the hardest lens material and offers the best protection against scratches. But glass lenses can shatter more easily than plastic lenses, are twice as heavy as plastic lenses, and don't provide as much protection from the sun's harmful ultraviolet (UV) rays.
Unless your main concern is scratch protection (and you don't mind wearing heavy glasses that might slide down your nose frequently) heavy, your better choice in a lens material for your eyeglasses is one of the options available in plastic.
CR-39 Plastic
For many years, CR-39 plastic has been the standard lens material for eyeglasses. (The "CR-39" is the name given to the resin formulation by the original manufacturer.) CR-39 plastic lenses are half the weight of glass lenses, have better ultraviolet (UV) light protection, are less prone to shattering, and can be tinted more easily. And with an added scratch-resistant coating, they are nearly as resistant to scratches as glass lenses. CR-39 plastic lenses are about the same thickness as glass lenses.
Polycarbonate lenses
Polycarbonate was one of the first "thinner, lighter" lens materials. Polycarbonate lenses are both thinner and lighter than CR-39 plastic lenses. But the most important feature of polycarbonate lenses is their impact resistance. Polycarbonate lenses are 10 times more impact-resistant than glass or regular plastic lenses, making them the preferred choice for safety glasses and eyewear for children and adults who desire lightweight, protective lenses.
High index plastic lenses
High index plastic is a term used to describe a variety of plastic lens materials that are thinner and lighter than regular CR-39 plastic. For a given prescription power and lens design, the factor that determines lens thickness is the index of refraction (also called refractive index) of the lens material. Materials with a higher refractive index bend light more efficiently than materials with a lower index of refraction. CR-39 plastic lenses have a refractive index of 1.498. Any lens material that has a refractive index higher than glass (1.523) is considered a high index material.
Today's high index plastic lenses sold in the United States range in refractive index from 1.54 to 1.74. One of the most popular high index lens materials has a refractive index of 1.67. Lenses of this material are about 50% thinner than lenses made of standard CR-39 plastic.
Your professional optician will be able to help you determine which high index lens material is best for your prescription and budget.
Found the article here
http://www.refractivesource.com/patients/alternatives/glasses/lenses-material.htm
Choosing Eyeglass Lenses: By Material
Plastic versus glass lenses
Glass is the hardest lens material and offers the best protection against scratches. But glass lenses can shatter more easily than plastic lenses, are twice as heavy as plastic lenses, and don't provide as much protection from the sun's harmful ultraviolet (UV) rays.
Unless your main concern is scratch protection (and you don't mind wearing heavy glasses that might slide down your nose frequently) heavy, your better choice in a lens material for your eyeglasses is one of the options available in plastic.
CR-39 Plastic
For many years, CR-39 plastic has been the standard lens material for eyeglasses. (The "CR-39" is the name given to the resin formulation by the original manufacturer.) CR-39 plastic lenses are half the weight of glass lenses, have better ultraviolet (UV) light protection, are less prone to shattering, and can be tinted more easily. And with an added scratch-resistant coating, they are nearly as resistant to scratches as glass lenses. CR-39 plastic lenses are about the same thickness as glass lenses.
Polycarbonate lenses
Polycarbonate was one of the first "thinner, lighter" lens materials. Polycarbonate lenses are both thinner and lighter than CR-39 plastic lenses. But the most important feature of polycarbonate lenses is their impact resistance. Polycarbonate lenses are 10 times more impact-resistant than glass or regular plastic lenses, making them the preferred choice for safety glasses and eyewear for children and adults who desire lightweight, protective lenses.
High index plastic lenses
High index plastic is a term used to describe a variety of plastic lens materials that are thinner and lighter than regular CR-39 plastic. For a given prescription power and lens design, the factor that determines lens thickness is the index of refraction (also called refractive index) of the lens material. Materials with a higher refractive index bend light more efficiently than materials with a lower index of refraction. CR-39 plastic lenses have a refractive index of 1.498. Any lens material that has a refractive index higher than glass (1.523) is considered a high index material.
Today's high index plastic lenses sold in the United States range in refractive index from 1.54 to 1.74. One of the most popular high index lens materials has a refractive index of 1.67. Lenses of this material are about 50% thinner than lenses made of standard CR-39 plastic.
Your professional optician will be able to help you determine which high index lens material is best for your prescription and budget.
sacredsoul
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AlphaAV
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guys 2 questions :
- where is a shop where I can find a very extensive selection of Nike Eyewear (the prescription lenses type, not the sunglass type) ? Have been to various optical shops, but some small shops carry a bit here a bit there
- Who is the distributor for NIke Eyewear in SG ? Called Nike SG but no surprise they are not the distributor (similarly try calling Hugo Boss and see if they are the distributor for their own brand of eyewear and they will probably tell you not)
- Any recommendations for a spectacles model with clip-on sunglasses ?
sacredsoul
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hi,does anyone knows what is cheapest price for hi index lens?
was quoted S$180 & S$220 for hi index 1.67 lens.difference in price due to different brand.the price for hi index 1.6 lens is S$120.
are the prices too high or is it similar elsewhere?thanls
was quoted S$180 & S$220 for hi index 1.67 lens.difference in price due to different brand.the price for hi index 1.6 lens is S$120.
are the prices too high or is it similar elsewhere?thanls
seriousbuyer0000
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hey guys, any idea where i can land myself a pair of chrome hearts sunglasses? i only saw normal glasses frames in some shops but not sunnies. would appreciate the help thanks!
stanleyj
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any pictures of it? are you selling?
CrimsonP
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hey guys i'm looking to get a tag heur glasses for myself
any recommendation of shops to purchases and try on as i don't wanna anyhow enter unknown optical shop and chop carrot head
frameless or half frame will be better?
any recommendation of shops to purchases and try on as i don't wanna anyhow enter unknown optical shop and chop carrot head
frameless or half frame will be better?
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