What is the lightest eyeglass lens?

If you want to change or replace eyeglass lenses, talk to your eye health care provider. While you can buy eyeglass lens replacements online, it isn’t smart to try to replace your own glasses lenses. Choose a lens material with a refractive index greater than 1.60. The higher the index of refraction, the thinner your lenses will be.

• Polycarbonate can be used in 35% of all prescription glasses.
• This is mainly because of its lighter weight, impact-resistant, thinner and much more scratch-resistant properties.
• While no lens is scratch-proof, this special coating does make lenses harder to scratch when dropped or rubbed against a hard surface.

Conventional glass or plastic lenses reflect about 8% of light that otherwise would reach the eye. High-index lenses can reflect around 50% more light than regular glass or plastic lenses. All lens materials block some light from passing through the lens. This light reflects back from the lens surface, causing distractions and reducing the clarity of night vision. Aspheric lenses are made with flatter curves and also have a noticeably slimmer profile than regular plastic lenses. Lens materials which have a refractive index higher than standard CR39 plastic (1.50) and regular glass (1.52) are believed high-index lenses.
Adding AR coating might help make the best sunglass lens, free of all glare and sun reflections. Polycarbonate lenses are gradually taking over a significant part of the optical market share once dominated by plastic lenses. This is mainly because of its lighter weight, impact-resistant, thinner and more scratch-resistant properties. We offer free basic 1.5 index lenses on all prescription eyeglasses.

Types Of High

Polycarbonate lenses have higher impact resistance and provide greater protection than plastic lenses. Glasses that require a higher prescription and so are fitted with polycarbonate lenses could cause chromatic aberration .
That’s because of presbyopia, an age-related change that affects your eye’s lens. Our complimentary basic plastic lenses are available in two indexes. Car windshields prevent most UV light from reaching the lens. However, some newer progressive lenses may darken slightly in the car on a sunshiney day. NXT lenses tend to be more expensive than other types of lenses. If you want any assistance in selecting the right lenses for the eyewear, please contact us now. Our expert team have vast years of working experience in the optical industry and will help guide you through your choice making process.

• High-index lenses can reflect up to 50% more light than regular plastic lenses.
• So adding on anti-scratch coatings will help protect plastic lenses from
• drawback may be the high amounts of chromatic aberrations, an optical distortion that causes colored halos or fringes around lights or blurred vision.
• If you’re looking to tint your lenses to a dark shade, you can’t do so with high-index lenses.
• Polycarbonate lenses are gradually overtaking a significant portion of the optical market share once dominated by plastic lenses.

Eyeglasses are very easy to break, especially lenses and frames. If you need to change the design of your glasses, it is advisable to ask a professional. Trivex is really a more rigid material, rendering it a better selection for rimless or drill mount frames, and is just as impact resistant as polycarbonate. Trivex is much lighter than standard plastic however, not quite as thin as polycarbonate. Because of these properties, it’s the lens material of choice for children’s lenses, sports lenses, and safety lenses. It isn’t unusual for 1.67 high-index lenses and 1.74 high-index lenses to cost 3x to 4x the cost of standard plastic or glass lenses.

Do I Want High Index Lenses?

If you have a very strong prescription, you should think about ultra thin high index 1.74 lenses. And because AR coating virtually eliminates lens reflections, it makes high-index lenses look nearly invisible. Others see your eyes, not distracting reflections in your lenses. Generally speaking, the bigger the index of refraction of a lens material, the higher the cost. Glasses lenses with an aspheric design have a slimmer, more attractive profile than regular lenses. An effective eye doctor visit is half the battle with regards to helping your son or daughter see better. The hard part comes when you have to persuade them to wear their new glasses each day.

polycarbonate lens material first. Most updates to high-index lens add-ons roll out half a year to a year later.

Trivex

Lenses with a refractive index of just one 1.67 and higher could be less than half the thickness of regular plastic lenses. Alternatively, polycarbonate lenses (index 1.59) may be only 20% thinner than regular plastic lenses. The refractive index of the very most popular eyeglass lens materials used today ranges from 1.498 (CR-39 plastic) to 1 1.74 (a kind of high-index plastic).
Since the introduction and use of Plastic lenses (also called CR-39), it has sealed its mark as the most preferred choice in the optical industry. Prescription is not the only factor used to determine which lenses are right for you personally. Pupillary distance, frame type, and lifestyle needs may also be indicators. If you’re looking to tint your lenses to a dark shade, you can’t do so with high-index lenses.