Trivex and high index lenses are relatively niche choices, and many people are not very familiar with them. However, in the process of choosing eyeglass lenses, these two are also popular options. They each have their own advantages and are suitable for different needs and lifestyles.

In this article, we will introduce you to all the knowledge about trivex and high index lenses, including their advantages and disadvantages, to help you better understand and choose the lenses that are right for you.

What are Trivex lenses?

Trivex lenses are made from a relatively new material called Trivex. Trivex material is a special optical polymer that is stronger, clearer, and more scratch-resistant than other lens materials. Trivex was originally developed by the U.S. military to make ballistic eyewear to protect soldiers’ eyes, making it ideal for outdoor use. This also makes it one of the best materials for prescription eyewear.

Later, due to the excellent performance of this material, it caught the attention of the eyewear industry and was introduced by PPG Industries in 2001, gradually being used in the manufacturing of eyeglass lenses. Trivex lenses are based on a polyurethane prepolymer. In other words, these lenses are made from a lightweight, low-density plastic. Trivex lenses not only have excellent impact resistance but also high light transmission and excellent optical clarity, making them an ideal choice for many people’s eyewear needs. In addition to use in regular eyeglasses, Trivex lenses are also widely used in areas such as sunglasses and sports goggles to meet people’s needs for eye safety and comfort.

What are High Index Lenses?

The numbers marked on lenses, such as 1.499, 1.56, 1.61, 1.67, 1.74, and 1.59, indicate the lens’s refractive index, which varies with different materials. High index lenses generally refer to those with refractive indices of 1.61, 1.67, and 1.74. For correcting nearsightedness, all other parameters being equal, the higher the lens’s refractive index, the lower and thinner the lens’s edges, and the lighter the lens. High index lenses are typically used to correct higher degrees of nearsightedness or farsightedness because they can reduce the thickness and weight of the lens while providing a better aesthetic result. High-index lenses are more durable and can be used in semi-rimless and rimless glasses. Moreover, most high-index lenses are aspheric lenses, which can bend light more effectively than regular lenses, making the lenses thinner, lighter, and flatter.

Trivex vs High Index: Which Should I Pick?

Choosing the right lenses depends on many factors. Trivex and high index lenses each have their own characteristics. Below is a detailed comparison from aspects such as lens thickness and weight, optical clarity, impact resistance, scratch resistance, etc., for reference.

Thickness and Weight

The refractive index of Trivex lenses is 1.53, which is lower compared to high index lenses(index 1.61, 1.67 and 1.74). Although Trivex lenses can provide thinner edges while maintaining a lower weight, the difference is still significant compared to high index lenses. When comparing the two at the same prescription, you will find that high index lenses are always thinner, and lenses with higher prescriptions are even lighter. For correcting higher degrees of nearsightedness or farsightedness, high index lenses would be a better choice.

Optical Clarity

The Abbe value of Trivex lenses is 45, while high index lenses generally have an abbe value around 30. Compared to high index lenses, Trivex lenses have a higher abbe value, providing excellent optical clarity, accurate, and clear visual effects, with lower dispersion and distortion.

Impact Resistance

Trivex was primarily developed to manufacture ballistic eyewear to protect soldiers’ eyes, and its outstanding impact resistance undoubtedly surpasses that of high index lenses. Due to its robustness and durability, Trivex lenses can minimize the risk of injury, making them suitable for activities and environments that require additional protection, especially for children and athletes.

Scratch Resistance

Trivex and high index lenses both have scratch resistance, but we still recommend coating the lens surface with an anti-scratch film to better protect the lens from scratches.

Conclusion

If you are an athlete, outdoor worker, or child, Trivex may be more suitable for you, as its impact resistance is unparalleled, greatly reducing the risk of injury. However, if you have a high prescription, lighter and flatter high index lenses may be more suitable for you. Highly nearsighted individuals can avoid wearing thick lenses that make their eyes look unusually small, while farsighted individuals can avoid wearing lenses that make their eyes look larger. This can reduce the stress on highly nearsighted individuals and improve aesthetics. Additionally, high-index plastic can provide more color and size options and is more readily available, while the choice of Trivex is relatively limited. Lastly, price is also a major consideration. 1.61 and 1.67 high index lenses are relatively affordable, followed by Trivex lenses, with 1.74 high index lenses being the most expensive. Therefore, before making a choice, you need to consider your budget.