High Index Lenses

High-index lenses revolutionize the eyewear experience, offering a sleek and functional alternative to traditional lenses. But what are high index lenses? In a nutshell, these lenses are designed with a higher refractive index, making them thinner, lighter, and more visually appealing than their conventional counterparts.

To comprehend the magic behind high-index lenses, let’s talk about refractive index. In simple terms, refractive index measures how efficiently a material can bend light. The higher the refractive index, the more effectively the material bends light. High-index lenses, with their elevated refractive index, excel at this light-bending feat, ensuring optimal vision correction with minimal lens thickness.

Reduced Thickness

The primary advantage of high-index glasses is their ability to be significantly thinner than standard lenses. The higher refractive index allows these lenses to bend light more efficiently, resulting in a sleeker and more aesthetically pleasing appearance. This reduction in thickness is particularly beneficial for individuals with strong prescriptions, minimizing the visual distortion and the “bug-eye” effect often associated with thicker lenses.

Lightweight Comfort

High-index glasses are lighter than traditional lenses due to their reduced thickness. This lightweight characteristic enhances overall comfort, making them an excellent choice for individuals who prioritize ease of wear, especially those with stronger prescriptions. The lighter weight reduces the pressure on the nose and ears, contributing to a more enjoyable and comfortable wearing experience.

Improved Aesthetics

The combination of reduced thickness and lighter weight contributes to improved aesthetics. High-index glasses offer a more modern and attractive appearance, allowing individuals to enjoy the functional benefits of vision correction without compromising on style. The sleeker profile of these lenses enhances the overall look of eyeglasses, aligning with contemporary fashion trends and personal preferences.

key features
of high index eyewear

In addition to the advantages outlined above, high-index glasses boast a multitude of other distinctive features that contribute to the overall well-being and satisfaction of the wearer.

Materials Matter – Durability and Clarity: High-index lenses come in various materials, including polycarbonate, Trivex, and other advanced options. Each material brings its own set of benefits, influencing factors such as durability and clarity. Choose the material that aligns with your lifestyle for a personalized eyewear experience.

Prescription Types – Versatility at its Best: High-index lenses aren’t limited to specific prescriptions – they’re versatile enough to cater to various vision correction needs. Whether you require single vision, bifocal, or progressive lenses, high-index options have you covered.

Cost Considerations – Investing in Comfort and Style: While high-index lenses may come with a slightly higher price tag, the investment is well worth it. Consider the enhanced comfort, improved aesthetics, and advanced technology – factors that elevate your eyewear experience to a whole new level.


The specific prescription you seek determines the required index of refraction for optimal vision. This index is influenced by the speed at which light travels through the material. As light undergoes more refraction, its speed within the material decreases. Consequently, the efficiency of the lens in refracting light is directly proportional to the lens’s refractive index.

A lens is classified as high-index when its refractive index surpasses that of traditional materials like plastic or glass, commonly used in eyewear. The typical range of refraction falls between 1.53 and 1.74. Notably, when the refractive index reaches 1.7 or higher, the lens is typically around 50% thinner than its glass or plastic equivalent.

RX Safety proudly offers a comprehensive collection of prescription glasses with 1.67 and 1.74 high index glasses to meet your unique requirements. Our diverse range of frame styles and lens options allows you to personalize your eyewear, ensuring that you not only have the perfect prescription but also a design that suits your style.

1.67 high index lenses

1.67 high index lenses are a popular choice for individuals seeking thinner and lighter prescription eyewear. With a higher refractive index, these lenses effectively reduce the thickness and weight of the glasses, providing a sleeker and more comfortable wearing experience.

This option is especially beneficial for those with stronger prescriptions, as it minimizes the cosmetic impact of thicker lenses, resulting in a more aesthetically pleasing appearance.

1.74 high index lenses

1.74 high index lenses represent an even higher level of thinness and lightness in prescription eyewear. Ideal for those with very strong prescriptions, these lenses offer superior optical performance while maintaining a slim profile.

The 1.74 high index lenses are known for their exceptional ability to minimize distortions and aberrations, providing wearers with clearer vision. This advanced technology ensures that individuals with high prescriptions can enjoy a more attractive and comfortable eyewear solution.

HOW TO ORDER high index lenses glasses



RX Safety offers a wide range of frames that will match perfectly with your high index lenses. Choose between eyeglasses, sunglasses, or check out our High Index Glasses collection here.

After choosing the perfect frame, click in ‘select prescription lenses’


select prescription
type & material

Inside our prescription form, you can select your prescription type. Choose between single vision and progressive bifocal. Then, you will choose your lens material. This is where you select your high index lenses.



choose LENS tint

Customize your lenses by choosing your lens color, including Transition options. The high index lenses can also be upgraded with special coatings such as anti-fog and anti-reflective to improve the overall performance of the glasses.



add your prescription

Now it is the time to upload or fill your prescription information. You’re done! The rest is with us. We will work on your high index glasses and deliver to your address.

add your prescription information

High-index lenses aren’t just a vision correction tool – they’re a lifestyle upgrade. Elevate your eyewear experience with the thin, lightweight, and stylish solution that high-index lenses bring to the table. Explore our collection at RX Safety and embrace a new era of eyewear excellence!

High Index Lenses 1.67 vs 1.74


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