High Index Plastic Glasses

Yes, high index lenses can be utilized in safety frames and can qualify as rated safety glasses, but there are restrictions. For instance, to reach the impact-resistant standard required of the safety lens designation, high index lenses must have a minimum thickness of 3.0mm. Lenses below that level are too brittle to meet safety standards.

A choice with high index lenses can be an “aspheric” design, that may donate to a thinner lens appearance and profile. Aspheric means that instead of having a round, or spherical curve on leading surface, the curve gradually changes from the biggest market of the lens to the periphery of the lens.

Our Number One Organic Lens Material, A Bestseller

Prescription lenses all have a definite “index”, which ranges from 1.56 to at least one 1.74. For strong prescription, the bigger the index, the thinner the lens; for weak prescriptions, a minimal index lens will undoubtedly be no thicker than high index eyeglass lenses. As a result, if you are searching for the “thinnest eyeglass lenses” for the prescription, read more so you don’t pay extra cash for lenses that are not thinner. High-index lenses are eyeglass lenses that bend light more efficiently than regular glass or plastic lenses. This is due to the lens material having an increased index of refraction than regular glass or plastic lenses. Lens materials that have an increased index of refraction produce thinner glasses.

• Furthermore, aspheric curves come standard in many high index products, particularly 1.66 and 1.70 products, and are available in 1.60.
• Experience Transitions lenses, the world’s #1 make of adaptive prescription lenses.
• They are a convenient solution for eyewear that provides comfortable vision both inside and outside.
• You may be able to purchase them in the office, from an eyeglass shop, or even online.
• While both regular and high index lenses function in the same way,

Having said that, 1.74 creates an incredibly thin lens at a full 35% thinner than standard which is more than enough for some prescriptions. Asphericity reduces spatial distortion, reduces magnification or minification, and additional helps maintain a thin and flat lens profile. High index material, however, will have a lesser Abbe value that could potentially affect patients who are sensitive to chromatic aberration.

Head To Hoya Vision Global Site

The initial, naturally, is how heavily your glasses weigh down on your nose and ears. While ultra-thin glass lenses may look amazing, they are often overweight for rimless frames without support under the lenses as well as anchoring on top of the half. Polycarbonate lenses has a high index of refraction 1.59 and low density making PC lenses 20% thinner and 25% lighter than regular plastic lenses. Polycarbonate lenses will be the most impact resistant lenses out there. Therefore, it is the industry standard for safety goggles, and strongly suggested for kids’ lenses. A lens for nearsightedness is designed to be thinner in the center but thicker round the edges.
These lenses are especially helpful for strong prescriptions, yet they will create a noticeable difference in almost every degree of vision correction lenses. Trivex has the lowest specific gravity of popular eyeglass lens materials. This makes Trivex lenses very lightweight and comfortable Though Trivex lenses (index 1.53) could be only 10% thinner than regular plastic lenses, they may be around 30% lighter. Polycarbonate lenses also have built-in ultraviolet protective properties. Similar to the way that sun block prevents the sun’s rays from damaging the body, UV protection shields the eyes from exactly the same detrimental light rays.

• They offer comfort and clear vision even though you wear them for years.
• Eyeglasses are very easy to break, especially lenses and frames.
• Guideline is that the bigger the index of refraction, the thinner and much more comfortable the lenses will be.

The first step would be to get yourself a fresh eye examination for those who have not had one within the last year. From here, you and your doctor could work together to choose the right prescription and lens type to correct your vision. Make an appointment with your eye
Only glass lenses won’t benefit greatly from the scratch-resistant coating, as glass possesses this feature naturally. Conventional plastic or glass lenses reflect approximately 8% of light, so only 92% is left to enter your eyes for effective vision.

Remember how delicately you treat your glasses, and which areas of high index lenses matter most for you. Would you like the thinnest possible lenses or just something thin enough to fit into your favorite frames? Then, of course, there’s weight which varies somewhat widely between your material choices. If you’re uncertain, keep reading as we break down the fundamental differences between glass and plastic high index lenses. If you want thinner, lighter lenses, and have an milder prescription, then mid index lenses are the way to go. Thicker lenses increase internal reflections that reduce vision quality.