Are high index lenses thinner than polycarbonate lenses?

The refractive index of any substance may be the speed of light in that substance compared to the speed of light in a vacuum expressed as a ratio. Light travels fastest in a vacuum and slower through different materials. Eyeglass lenses are often categorized by their refractive index . Contact a watch doctor near you to learn which lenses are best for you personally and your eyes.
Content is reviewed before publication and upon substantial updates. Hi-index lenses are on the high end of the lens spectrum, both in quality and pricing. Within this group, we are able to also describe different tiers of hi-index as basic, better, and best. Allentown Optical is a fully Independent, knowledgeable, full-service quality lab. Our personal, customized services meet all of your optical needs – and some.

The curvature in a minus lens will get gradually steeper toward the periphery and a plus lens curvature will gradually flatten toward the periphery. This is

High Index Vs Regular Lenses

The higher the index of refraction, the thinner your lenses will be. Lenses with a refractive index of just one 1.67 and higher could be not even half the thickness of regular plastic lenses. However, polycarbonate lenses (index 1.59) might be only 20% thinner than regular plastic lenses. 1.61 High-Index lenses bend light better and also have thinner edges than lenses with the same prescription power made of conventional plastic material. The 1.61 are 20% thinner than 1.50 Standard and so are recommended for full-rim or semi-rimless frames. Up to ten times more impact resistant than regular plastic lenses, they’re both perfect options for children.

All eyeglass lenses reflect some light, which reduces the quantity of light that enters the eye to form visual images.

Aspheric Lenses

High-index lenses include a unique aspheric design which facilitates a flatter lens curvature, leading to reduced magnification and improved appearance. If you want high-index lenses contact a watch doctor near you to start out improving your vision.

• While no lens is scratch-proof, this special coating does make lenses harder to scratch when dropped or rubbed against a difficult surface.
• They might be lightly tinted but won’t accept an extremely dark tint color.
• It has incredible impact resistant abilities rendering it a great choice for bulletproof glass and fighter jet cockpits among other activities.
• These lenses use digital computer technology to correct a wide range of vision problems, resulting in sharper and brighter vision.

High-index lenses are especially helpful assuming you have a strong eyeglass prescription for nearsightedness, farsightedness or astigmatism. The difference high-index lenses make in turning thick glasses to thin glasses can be quite dramatic should you have a strong prescription. If you have a strong prescription and are looking for thinner, lighter lenses with a more attractive appearance, high-index lenses are the way to go.

The Difference Between 1 67 High Index Lenses And 159 Polycarbonate Lenses

High index lenses offer a thinner lens but usually have lower abbe values. The Abbe value determines to a big part the optical integrity of the lens. When cleaning lenses with anti-reflective coating, be sure you utilize the products recommended by your optician. Speak with your optometrist, or a watch care specialist to determine if high-index glasses are your best option for prescription lenses. Trivex is really a more rigid material, making it an improved selection for rimless or drill mount frames, and is just as impact resistant as polycarbonate. Trivex is lighter in weight than standard plastic but not quite as thin as polycarbonate. They have been a popular choice for both adults and children with glasses going back 50 years and the formula has only improved since that time.
Polycarbonate is a different type of lens material that’s thinner and lighter than regular plastic. Complicated mathematical formulas are employed in conjunction with the optical prescription to look for the exact thickness of a lens in a particular frame for a specific patient. Just like high index lenses, aspheric lenses are also thinner than regular lenses.