What does 1.59 index lenses mean?

Lens reflections can also cause glare, further reducing vision in these circumstances. It is the number that defines the thickness or thinness of the lens. The index number is also the measurement which defines how effectively the material bends the light.
A high-index lens can be thinner while still effectively bending the light in order that it corrects your vision. Because the lenses are created from a lighter weight material, they are ideal for farsightedness.

• Our progressive lenses are also scratch-resistant, and feature anti-reflective, anti-static, and UV protective coatings.
• The individual selected a fashionable, rectangular frame, 52-20, and is asking about polycarbonate lenses.
• Because these lenses are highly personalized, they can correct even the most unique eyes, and offer all the great things about bifocal lenses minus the obvious horizontal line.
• This makes it convenient for the wearer’s nose and ears, even after long hours of wear.

Polycarbonate lens is thinner and lighter and also shatter-proof,making it the perfect choice for kids and active adults. When cleaning lenses with anti-reflective coating, be sure you utilize the products recommended by your optician. People with nearsightedness, farsightedness and astigmatism may be benefited with high-index lenses. Actually, these lenses can be suitable for any prescription due to its enhanced performance, cosmetic appeal and clarity.

Kids’ Glasses

Ask your eye doctor or optician which specific lenses can be found in your prescription. Bifocal and trifocal may also be available, yet
Farsighted glasses can simply become quite heavy, and through the use of lighter lenses, the glasses are generally more comfortable. High-index lenses mean that the lens itself could be both thinner and lighter. This enables your glasses to be as comfortable and fashionable as possible.

If your prescription isn’t quite as extreme , polycarbonate is a superb choice.

Top Materials

The resulting number (1.5, 1.6, 1.67, 1.74) is referred to as the “index.” The bigger the number, the more light is slowed up or bent. This means high-index lenses bend light at steeper angles than standard-index, hard resin lenses. Therefore, high-index lenses need less curvature to attain the same focal power. That’s why a lens made from a 1.67-index material can be significantly thinner when compared to a standard-index (1.50) plastic material with the same prescription. A bonus advantage to choosing high-index lenses may be the fact they’re resistant to scratches.

• Polycarbonate lenses get a lot of press because they’re ideal for several specific uses, but let’s not discount the value of sleek, slender, and clear 1.67’s.
• Polycarbonate is a 1.59 index high-impact material, this means it is strong and protective.
• High-index lenses can reflect around 50% more light than regular glass or plastic lenses.
• They drift happily from the optometrist to the frames shop without an excessive amount of worry.

Lens materials which have an increased index of refraction produce thinner glasses. The 1.56 Mid-Index lenses are automatically included in our frame prices. In other words, if you visit a $5.95 pair of frames, the price not only includes said frame but additionally 1.56 lenses with it!

However, the thickness of the lens is also determined by the frames size – that is frame length and breadth, frame material and Pupillary Distance . If the frame does not match your PD then it’ll be not as thin as you anticipate. For this reason greater reflectivity, it’s essential to have an anti-reflective lens coating applied to high-index lenses. AR-coated high-index lenses transmit around 99.5% of light to the eye for optimum vision. Small the frame, the thinner your high-index lenses will undoubtedly be.
These lenses also provide 100% protection from the sun’s Ultra violet rays and are available in a wide variety of lens materials and designs, including bifocal and progressive lenses. Select a lens material with a refractive index greater than 1.60. The higher the index of refraction, the thinner your lenses will undoubtedly be. Lenses with a refractive index of just one 1.67 and higher can be not even half the thickness of regular plastic lenses. On the other hand, polycarbonate lenses (index 1.59) might be only 20% thinner than regular plastic lenses.