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Doctor insights on: What Are High Index Lenses

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What are high index lenses?

What are high index lenses?

Plastic lenses: These are eyeglass lenses made of a plastic which will bend light more than the usual plastic . Because of this, a thinner lens is possible and has the advantage, being plastic, of being lightweight although somewhat susceptible to scratching. ...Read more

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Could you tell me what happens if you use high index lenses on a low prescription?

It will work: High index will simply bend light more for a given degree of optical need. If you have a low prescription, the lens will in this case be thinner than a lower index. There will be no difference in the quality of the image. ...Read more

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'm currently wearing 1.67 high index lenses with no anti glare coating. Is it reasonable to think that?

'm currently wearing 1.67 high index lenses with no anti glare coating. Is it reasonable to think that?

Most likely: The anti glare coating will give you a little more visual comfort but is not essential. It is like the anti-reflective coating that looks greenish on a camera lens. The vision will be ever so slightly more sharp this way. ...Read more

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I was wondering what are the differences between polycarbonate, polycarbonate aspheric, and 1.67 high index lens?

I was wondering what are the differences between polycarbonate, polycarbonate aspheric, and 1.67 high index lens?

Lens materials: Polycarbonate and 1.67 high index are different types of plastics used to make lenses for glasses. Aspheric is a type of lens design. Generally the higher index of the plastic, the thinner the lens can made. Higher index materials may induce more distortion in the periphery of the vision. ...Read more

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Can an astigmatism prescription of 2.25x100 require a high index lens?

Can an astigmatism prescription of 2.25x100 require a high index lens?

No: This could easily be done with a standard lens material. High index is nicer because it is thinner and lighter, but more expensive. ...Read more

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Hi docs, would high index lenses make my eyes smaller?

Hi docs, would high index lenses make my eyes smaller?

No: It is the power of your prescription that will make your eye look smaller or larger. ...Read more

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Please tell me how long it takes for to get used to high index lenses?

Please tell me how long it takes for to get used to high index lenses?

Rapid adjustment: Your eye will find almost difference between normal and high index lenses so the adjustment is minimal. High index simply allows you have a lighter lens pressing on your nose. ...Read more

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Help, what type of lenses should I get for a high prescription?

Help, what type of lenses should I get for a high prescription?

Thin grind: Not sure of your age, however, thin grind edges will reduce the thick lens appearance. See your local optician and ophthalmologist to go over your options. ...Read more

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My periodontal hygienist wears high powered lenses that she removes when finished. Others tell me their hygienists do not use them. Benefits?

My periodontal hygienist wears high powered lenses that she removes when finished. Others tell me their hygienists do not use them. Benefits?

Better vision: Magnification loupes allow your hygienist to see better--it's the difference between her looking at teeth at normal size vs baseball size. That means she can see more detail, which should allow her to provide a more detailed cleaning. Cleaning teeth is not just visual, though--a lot is done by feel, especially between the teeth. So the loupes can provide a benefit, just not on all areas of teeth. ...Read more

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Polycarbonate vs plastic lenses best for high myope?

Polycarbonate vs plastic lenses best for high myope?

Probably polycarb: Polycarbonate lenses are "high index" lenses . They are often used in high myopes to allow for the glasses to be thinner and lighter. They do have more chromatic aberration though. Discuss the various pros and cons with your optician before deciding what it right for you. ...Read more