What is the difference between high index and polycarbonate lenses?

Our glasses include prescription lenses with scratch-resistance, anti-reflective lenses that block 100% UV rays. High index lenses with 1.74 high index are the thinnest lenses available, and are made only for people with the highest prescriptions. If your prescription is leaner than +/-6.00 sphere, there is no need so that you can spend the excess money for an ultra high index lens. This material also offers impact-resistant properties but gets the advantage of an increased Abbe value. The Abbe value of a lens material measures how widely the lens disperses different wavelengths of light.

Thinner lenses require less lens material, which reduces the overall weight of the lenses. Lenses made of high-index plastic are lighter than the same lenses made in conventional plastic, so they’re more comfortable to wear.

Pros, Cons & Costs Of High

The cost of eyeglass lenses depends on what they’re manufactured from and whether they have special features, coatings, or enhancements. Sometimes, you can cut costs if you buy new eyeglass lenses only online rather than from your eye doctor. However, you will need your eyeglasses prescription to be sure you get the correct lenses. The disadvantages of polycarbonate lenses are the fact that their abrasion resistance is poor, but when an anti scratch coating is put into this the impact resistance is reduced slightly. There’s much more to buying a new pair of eyeglasses than simply selecting an ideal frame.

• Materials on the high end of the range produce thinner glasses.
• They are able to also be treated with anti-scratch, anti-reflective, and UV-protection coatings to improve vision and lens durability.
• Anti-reflective coatings ought to be applied to all hi-index lenses because they tend to reflect up to 50% more light than regular plastic lenses.
• Whereas bifocal lenses have a distinct line in the lens where the two prescriptions vary – top of the part is to correct distance vision and the low part would be to correct close vision.

Old plastic lenses tended to yellow, and worse, to shatter on impact almost as badly as glass. High-index lenses are eyeglass lenses that bend light better than regular glass or plastic lenses. This is due to the lens material having a higher index of refraction than regular glass or plastic lenses. Lens materials that have a higher index of refraction produce thinner glasses. High-index eyeglass lenses will be the right choice if you would like thinner, lighter lenses and eyeglasses that are as attractive and comfortable as possible. Polycarbonate eyeglass lenses certainly are a type of high-index lens that are also scratch and impact resistant and protect your eyes from UV.
Depending on your prescription, you’ll need lenses of different diopter strengths. On the other side of the spectrum, if
1.67 high index lenses are incredibly thin and light, even surpassing 1.61 high-index lenses. This lens index is a great option for those having an extra-strong prescription. The lens index is really a numerical representation of the refractive capabilities of a lens’s material. Certain materials, especially those in high index lenses, will be able to bend light more efficiently.

Are High Index Lenses Worthwhile, Or Are They Merely

Mirrored sunglasses have a thin, metal covering on the lenses that reflects a high level of light and offer a mirror like finish on the outer surface of the lenses. Single vision glasses are made to help people who require correction of farsightedness, nearsightedness, or astigmatism. They will aid your eyesight to see properly whether for distance or for close reading and may reduce unnecessary eyestrain. High index lenses cost more than regular lenses as a result of materials they contain.
New digital versions of hi-index lenses are computer-generated and custom tailored to your prescription and frame measurements. The thinnest lenses possible are achieved by flattening the curves on the lens surface during manufacturing.

The four most common types of refractive error are astigmatism, nearsightedness, farsightedness, and age-related farsightedness. Before choosing high-index, speak with your eye doctor to find out if these lenses are essential for the individual prescription. With thinner high-index lenses, you’ll no longer have to worry about the appearance of your lenses and you may gain a larger selection of frames to pick from.
Lenses with a low Abbe value can have problems like colored halos, while a higher Abbe value means better optical quality. All lens materials block some light from passing through the lens. This light reflects back from the lens surface, causing distractions and reducing the clarity of night vision. Lens materials which have a refractive index higher than standard CR39 plastic (1.50) and regular glass (1.52) are considered high-index lenses. Crizal Forte UV is an exclusive anti-reflecting technology from Essilor. It’s specifically designed to safeguard your eyes from UV light. Essilor Crizal lens technology is applied to both sides of one’s glasses lenses.

Determining which lens is right for you can be quite a bit confusing … Though aspheric lenses offer advantages of all prescriptions, they are particularly beneficial should you be farsighted. Aspheric lenses help reduce the magnified, “bug-eye” look caused by regular, highly curved lenses for farsightedness, and they greatly reduce the “bulge” of the lenses from the frame. And because they have a slim profile, aspheric lenses have less