Doctor insights on:
What Are High Index Lenses
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
'm currently wearing 1.67 high index lenses with no anti glare coating. Is it reasonable to think that?
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
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
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
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 moreSee 2 more doctor answers
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
Glasses: I assume you are referring to glasses and in that cas the person you want to talk to would be a board-certified ophthalmologist. Most have an optical shop in their office and can give you a price for glasses. What I can tell you is to a degree it is worth spending more on a decent pair of glasses especially if you are wanting special lenses like high index or progressive. ...Read more
Is there a tradeoff between lens thickness and chromatic aberration? If you opt for higher index (more thin), the lower the abbe value tends to be?
Abbe value is the: Refractive efficiency of lens. Lens with high Abbe: disperse light less: less chromatic aberration. High index materials produce lower Abbe hence more chromatic aberration. Abbe values are inversely proportional to the degree of chromatic aberration. High index lenses are thinner and have more chromatic aberration. Yes it's a trade off. ...Read more
High index: Helps make lenses thinner, solution? To clean? Warm soap and water the best, dry with non scratch cloth. I like the sprays the optical stores have with soft cloth. ...Read more
Hi prot, lo sugar,: Of limited practical value. Based on intake of 100gm of isolated food-may not reflect portion size, and may not reflect intake, e.g. Most don't eat 100 gm or rice alone. Once you add meat, or fish, tofu, veggies, beans, nuts, seeds, etc you change the G.I. Aim for no refined sugars or grains, protein in every meal. ...Read more