Glass Lenses: Ya...nope we don't sell those anymore!

Every few months or so we get a customer walk in to TLG convinced that they need glass lenses and glass lenses only. If all you are worried about is scratch durability then sure glass is the best choice but in almost every other area? Please oh please consider the many more modern and comparable options.

In the world of eyewear, materials matter. Over time, we've witnessed a significant shift away from traditional glass lenses to alternatives like CR-39 and high index lenses. So, what led to the decline of glass as a preferred lens material? The reasons are multifaceted and hinge

on key issues of comfort, safety, and aesthetic appeal.

First and foremost, the weight of glass lenses poses a major drawback. They are heavier than their modern counterparts, which can result in discomfort, particularly when worn for prolonged periods. The added weight can strain the nose and ears, and the thickness of glass lenses, especially for higher prescriptions, can lead to a less flattering look.

Another crucial concern is safety. Glass lenses are prone to shattering upon impact, posing a risk of eye injury. This vulnerability makes glass lenses an unsuitable choice for active individuals, children, or those needing safety eyewear for professional purposes.

I have personally seen several glass lenses break or even shatter! Not a smart choice for those wanting a durable safe choice.

From an opticians perspective crown glass requires more work in tempering and edging. Some modern machines do not even have a glass grinding when anymore!

Last, the options available for progressive lenses in crown glass are very limited. The small handful of lenses available are so outdated that my grandparent had them on their price charts 30 years ago. For perspective, these would be early progressive “hard designs” full of edge distortion that many customers had a difficult time adapting too.

While glass lenses offer excellent optical clarity and scratch resistance, their downsides have led the eyewear industry to seek out more user-friendly alternatives.

CR-39 emerged as a promising solution. A plastic polymer that's lighter than glass, CR-39 offers good optical clarity, surpassing other plastic materials, and better shatter resistance, mitigating safety concerns associated with glass. These features, combined with a more budget-friendly price point, have made CR-39 a popular choice for a wide array of prescriptions.

High index lenses have also gained recognition, particularly for individuals with high prescription needs. These lenses bend light more efficiently, allowing for thinner and lighter lenses, even with stronger prescriptions. As a result, they offer improved comfort and a more appealing aesthetic, making high index lenses an attractive option despite their higher cost.

Please oh please consider moving on from glass! The shift away from glass lenses in favor of materials like CR-39 and high index lenses boils down to enhanced comfort, safety, and aesthetic appeal. As the eyewear industry continues to evolve, these modern materials offer promising alternatives that align with the needs and preferences of today's eyewear users.