Whenever you decide to buy new RX safety glasses whether you are going to buy it online or from any local retailer. You become confused to decide what kind of lenses will suit you. A lot of options included glass, polycarbonate, plastic, high-index, and trivex.
High-index VS Polycarbonate:
Many online eyewear retailers offer high-index lenses with upgrading conditions and some offer polycarbonate as come in standard lenses with frames. But due to what reason, why you should upgrade yourself from polycarbonate to high-index lenses. let’s make a comparison between these two upgraded lenses so that you can decide what you have to select.
- Refractive index:
Whenever we talk about the index of lenses, we basically are referring to the tendency of materials. How they bend the light that is called a refractive index. Basically, it is the ratio of the speed of light that travel through lens materials. Keep remembering that high-index Prescription safety glasses lenses are less distortion, lighter, and thinner. So if you have both lenses of the same power, higher index lens material will always be thinner. So technically we say that the lens materials with high refractive index, the standard glass or plastic lenses are considered as high-index.
- Polycarbonate lenses:
The history of polycarbonate is old as it was using in other industries like in fighter planes, astronaut helmet, and space shuttle windshield, etc. Due to lightweight and impact resistance material, in 1980, it was introduced for eyewear lenses. Now, it has become the standard lens material in a child, sports, and safety optical glasses.
Their refractive index is 1.59 and generally 20% thinner than regular lenses. polycarbonate has the tendency to protect your eyes 100% from hazardous UV rays.
- High-index lenses:
High-index lenses are generally recommended for those eye wearers who have a strong prescription. They are preferred due to lightest, thinnest, and visually appealing and of course comfortable eyeglasses. But it doesn’t mean that you just can go with these lenses in case of strong prescription. They make your specs lenses thinner and comfortable no matter what prescription you have. Generally, they start at 1.61 to as high as 1.74. You can order online prescription eyewear with any lens types.
What is better for you:
Technically, both materials don’t exist all the time for all prescription. But keep remembering, if you have a strong prescription and you want a lens that has a low refractive index. In this situation, if you choose plastic that can see well but the lens will be thicker. And thicker lenses create more distortion that causes unwanted eyestrain and bothersome as you wear it for a long time. You can visit www.eyeweb.com for a lot of options in lens materials.
There is no lens material exist that can allow passing 100% light through it. Some light is reflected back from the surface of the lens and it can reduce your clarity and create an annoying distraction. So for this, a high-index lens should be coated with anti-reflect and it will allow up to 99.5% light can pass through it. With this, they give you the best optical clarity and view out of the glasses. All brands like 3M safety glasses are offering polycarbonate lenses with AR coating.
Ultimately at the end of the day, the selection of lens actually does matter on your budget. Many reputable online stores offer polycarbonate lenses without anti-reflect coating but you should prefer with AR coating.