Thinner Lenses for Your Glasses and Sunglasses
If you require lenses to correct a vision problem, it’s important to choose the right lenses for your spectacles. You may wish to opt for thin lens options. Our choice of spectacle lens material and design can impact factors such as appearance, comfort, vision and safety. There are many different types of lens materials as well as additional features such as lens coatings, which can make your choice a difficult one.
There are a number of thin and light lenses that could have benefits for your vision as well as comfort. Thin and light lenses can be beneficial for those who require a high prescription, as well as improving the appearance and comfort of your glasses. This makes them a great choice for your next pair of lenses.
DIFFERENT LENS MATERIALS FOR THIN AND LIGHT LENSES
Over the last 20 years or so, there has been an increased demand for thin and light lenses that are stylish as well as practical. There have been a number of thin and light lenses created over the years to suit the different vision and lifestyle needs, each with its own features and benefits.
1.5 CR-39 LENSES
By the 1970s, the use of polycarbonate was introduced, primarily used for helmet visors. Polycarbonate was first used to create bulletproof-type glass for banks and other similar safety applications, before being used in the likes of children’s eyewear, sports glasses and safety glasses. Polycarbonate is even lighter than CR-39 and more impact-resistant.
Polycarbonate lenses have become the standard for safety glasses. As polycarbonate is less likely to break compared to regular plastic lenses, it is often a favoured material for rimless eyewear designs. Polycarbonate lenses will also block 100% of UV light.
HIGH-INDEX PLASTIC LENSES
High-index lenses are usually recommended if you have a strong prescription for myopia, hypermetropia or astigmatism. However, they can also make your spectacles much thinner and lighter, regardless of your prescription.
If you are short-sighted, your corrective lens will be thin in the centre and thicker at the edges. The stronger your prescription, the thicker the edges will be, which can make them more noticeable and may take away from the appearance of your eyewear.
High-index plastic lenses can bend the light more efficiently than regular lenses, meaning less material is required to correct the same level of refractive error. This is known as a higher refractive index, and results in thinner and lighter lenses, making them much more attractive and comfortable to wear.
Essilor Lenses are manufactured in 1.5, 1.6, 1.67 and 1.74 index materials. Each increasing index value has an effect of reducing edge thickness and weight.
Our experienced team at Pretavoir can help you to understand the different high-index lenses available, and which are best suited to your needs.