Glasses rest on the nose. If they simply say 580, then they're glass. Since the creation of the plastic lens, glass lenses are much rarer than plastic when it comes to prescription glasses. Sunglasses and glasses come in a number of popular styles and brands. Which offers the most effective UV protection? Costa Sunglasses lens color technology is built to address constantly changing light conditions. It's hard to describe but easy to know if … Costa Del Mar Glass lenses. It takes a far greater force to break this type of lens than a comparable glass lens, and while glass shatters, plastic will more likely dent, or if the force is great enough, crack without shattering. Both the plastic and crystal lens options available for the customer makes it convenient for them to easily choose the lens material they feel most comfortable with. Glass Lenses Besides, heavier lens can cause the glasses to slip down easily. The polarized polycarbonate and glass lenses come in seven colors, including our mirror options that address changes in light. Costa Del Mar is one expensive brand. I am pretty happy with the pics but sometimes they turn out a little flat. Compare that to a plastic lens. I am relatively new to DSLR photography and my lenses are all plastic. The 580 lenses boost colors and contrast by blocking out yellow light at 580 nm, and reduces haze and blur by … Price. Anti-Reflective Coating. With nearly 300 models available, Costa Del Mar sunglasses offer styles that work for every customer. Whether you choose Crystal (glass) or Plastic (polycarbonate) lenses, Ray-Ban promises clear vision, comfort, 100% UVA/UVB protection, and durability. You could tell whether they are made of real polycarbonate lenses at first from the look. Disadvantage to glass lenses… Refractive index refers to the rate at which light bends as it passes through the plastic of the lens. The plastic ones will be so easy to tell. Here’s our list of pros and cons: *Includes regular plastic, polycarbonate, and high-index plastic lenses. As with most brand-name items, there are fake versions of Costa Del Mar glasses available for purchase. I purchased a pair of Costa del mar sunglasses from ebay. However, today I was at an optical store where they said if you order 580p prescription lenses (which I do need Rx) that the polycarbonate lenses are “Trivex” (something that is not available in the non-prescription polycarbonate lenses). I need help making sure these are 100% authentic Costa glass lens. It is lightweight: Plastic materials are known to be lighter in weight and also strong to a certain extent.The lightweight property of plastic makes it a great eyeglass lens material because it will not be heavy inside a glass frame and permits for an easy fit in any type of glass frame. If the lens pops out of your sunglasses or eyeglasses, don't panic — you can usually put the lenses back in. The average price for a pair of Costa Del Mars with their 580g glass lens is roughly $187. If you have worn it for more than two years, it could be the real one. Another way of telling if it's glass, is use your teeth and 'knock' against it. It came with the Costa brown box in a zipper case with paper work. Tap them with the back of your fingernail and listen to the sound they make. Glasses frames are made from plastic or metal 2. High-index plastic lenses have a refractive index between 1.6 and 1.74; the index of ordinary plastic and polycarbonate lenses … Plastic lenses are impact resistant, making them a better choice for children, active adults, sportswear, and safety wear. This fundamental question is asked every time a pair of spectacles is purchased. If you have plastic frames, then heating them will help loosen the plastic so you can pop out the lenses. The 580 lenses were great, as always but Costa should be ashamed of putting their name on the glasses with such horribly designed frames. They are just as safe as plastic. Don't let anyone tell you that glass lenses aren't safe. Since prescription lenses bend light to correct vision, polycarbonate lenses can be thinner than glass or conventional plastic, making it the ideal material for heavy prescriptions. Trivex lenses are made from a urethane-based monomer. In comparison, the Maui Jims average price was $209. Must know : How to choose the ideal thickness Of course, these prices are always subject to change depending on whether or not the vendor is holding a sale or promotion. Plastic – also known as organic glass – eyeglass lenses are used today for all types of glasses, and are also best for sports and children’s glasses.. The huge reduction in weight and versatility in prescription frames has caused plastic to win out in popularity in the glass vs plastic lens material race. And you can choose your preferred lens features and tint in either material. Both plastic and glass have some pros and cons and […] Creators use a mold to construct the lenses in much the same way regular plastic lenses for glasses are made. You'll instantly be able to tell the difference. All Costa lenses have 100% UV blockage for maximum protection and 100% polarization to kill reflected glare. Looking at the front of the sunglasses the top left of the left lens have 580 engraved in it. You put the lens in a certain way, depending on the type of frame you have. Plastic Ray-Ban Lenses. The plastics are more clear than 90% of other glasses I've had on. Costa Del Mar’s 580 series lenses offer anglers and boaters the highest level of clarity in the world and are available in both glass and plastic. As a general rule of thumb, glass lenses will cost you more than plastic ones. Understanding glasses measurements. The higher the refractive index, the thinner the glass. Relax — you don’t really need to know this off the top of your head. Difference Between Plastic and Glass lenses Plastic vs Glass lenses Although there are a variety of lenses out there on the market, the most obvious choice is between glass and plastic lenses. And a third reason to buy glass lenses instead of plastic lenses is if you like the type of lenses that turn dark in the sunshine & get lighter in the shade this treatment works much better & responds quicker on glass. Frame size incorporates three key figures, all of which are measured in millimeters (mm). Winner: Glass Lenses . Plastic Lenses (CR-39) Plastic lenses or also known as CR-39 is the most common optical lens material you will find. 1. Glass lenses are clearer than polycarbonate plastic and will provide you with the crispest visual experience. Learn to spot a fake pair so that you can avoid buying a fake for the cost of a real pair of Costa Del Mar glasses. Costa Glass Lenses vs Costa Polycarbonate Lenses. The crystal and plastic lenses can easily be converted into prescription or polarized lenses, for the specific needs of an individual. The differences between glass or plastic lenses aside, the glasses come in classic and contemporary looks and top-of-the-line materials. Think fast: What’s the difference between glass and plastic* lenses? (That's IF it is glass) A plastic lens will have a clear, whitish appearance. For these reasons, glass lenses are no longer widely used for eyeglasses. Before we explore the technicalities of measuring glasses or even the best ones according to your head size, let’s talk about how glasses should fit. Trivex lenses are made from a lightweight, impact-resistant material. As others have said, the glass is heavier than the plastic. In the early days of vision correction, all eyeglass lenses were made of glass. Obviously all the super cheap ones are poly, or TAC. Yes, the polycarbonate is more durable than regular plastic lenses because of the special material. You wouldn’t want a pair of heavy glasses sit on your nose the entire day and leave red mark. Well, I ended up going with glass for all of the right reasons. In short, this is the most basic and important element, which you need to know. Thicker lens is generally heavier. These numbers usually include the frame model, colour code and measurements, as illustrated. When you look at the glass from the side it will have a green tint to it. Possible eyeglass frame materials that can cause allergic skin reactions include nickel-containing metal alloys, silicone nose pads, and coatings on plastic frames. If you're a glasses wearer you may notice some numbers on the arms or the bridge. You will find the following figures on your glasses: Lens width: Between 31-60mm Tap it With a Small Metal Object One of the most easily noted differences between plastic and glass is how the material transmits sound on light, sharp impact. It was developed in 2001 by PPG Industries as an alternative to polycarbonate. Schott glass sold to Barberini (unfortunately acquired by Luxottica last year) who makes most of the worlds glass sunglasses lenses for different manufacturers. If it's glass, it will make a bright, brittle sound. Few make Rx glass sunglasses though. Many regular glasses wearers already know this but newcomers can find it confusing. You’d need to keep pushing it up. Vaurnet, Costa del Mar, Ray-ban, Revo, etc. I have always heard that Costa glass lenses (580g) are clearer than their polycarbonate lenses (580p). Plastic or glass lenses? I own a pair of blue glass lenses and green glass lenses. Lenses that are held in place by a screw require a screwdriver in order to remove them. Which holds up best when scratched? Although glass lenses offer exceptional optics, they are heavy and can break easily, potentially causing serious harm to the eye or even loss of an eye. When buying your new pair of Costa sunglasses its key to understand the differences between their glass and polycarbonate lenses. I wanted to know if someone could actually show me 2 pics of the same subject, one shot with a plastic lens the other with a Canon L series lens (i assume the L is all glass construction). Costa Del Mar’s 580P models are the highest quality plastic lens sunglasses on the market. Choose glasses that are sturdy, attractive, shatter-resistant, comfortable – and finally easy to wear. They are very light and therefore comfortable to wear. Plastic is softer and doesn’t resonate the same way glass does when struck. I paid $175shipped. They are also highly break resistant. Glass lenses are the traditional ones, having been used for some time now, while plastic lenses are relatively newer. Blackfin grey lens 580g for glass. In that respect they outperform glass up to 100 times, depending on the type of plastic used. 580P will say 580P. Usually, the frame manufacturer prints the size numbers on the inside of the glasses’ temples. If you want to give your glasses a thorough cleaning or you need to replace a lens, then you may need to remove the lenses yourself without damaging them. Plastic lenses. 580G will say just say 580 in the upper left of the left lens. This very action can be pretty annoying. Advantages of Plastic Lenses. The following holds true for both materials: Choosing the most suitable one hinges on individual factors such as visual acuity and personal taste. How Glasses Should Fit. The Numbers on your Glasses. Sometimes they will print them on the bridge. Allergies to eyeglass frames are not common, but can be a problem for some people. Keep in mind that a lens can break if you do not put it back into the frame properly. In addition, if you could find that the real polycarbonate lenses will be so durable to use. Winner: Plastic Lenses . This is my 6th pair of Costas all with the 580 glass. I can personally tell a difference in the clarity of the lenses but that's being extremely picky. The hinge is simply a C shaped piece of plastic that snaps around a post. A lot of sunglass companies make glass plano lenses. The CR stands for “Columbia Resin” which is the polymer that the material is made out of and the 39 means that there were 38 other “Columbia Resin’s” that didn’t make the cut for optical lenses. OK, so prior to purchasing my last pair of Costas I went through the whole advantages / disadvantages of glass vs. plastic lenses routine. Crystal vs. Whether it’s sunrise or mid-day, our lenses are built to help you see what’s out there. 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