Lens surface coating

Lens Surface Coating & Types in clinically+optical way

1. Lens Surface Coating & Types Optom.Het Vora M-I 1

2. Why Coating is Done? Protection Appearance Clarity Fog

3. Types of coatings commonly applied. MAR Coating Tints Scratch Resistant Coating Mirror Coating Polarized Coating Edge Coatings 3

4. Uncoated (UC) (Treated Lenses) These lenses are treated with a chemical dye to block out harmful UV rays. The maximum protection is UV400nm.

5. Single Side Coated 5

6. Hard Coat (HC) While plastic lenses are easy to wear, the material used is softer and more prone to scratches than glass lenses – at least if untreated.  Special coatings with a hard lacquer matched to the material not only enhance the scratch resistance of the lenses, they also ensure constant visual quality and extend durability.  Thanks to the DuraVision Platinum coating, ZEISS offers a solution that is three times harder than the previous generation of hard coated plastic ZEISS lenses and 35% harder than AR coated mineral ZEISS lenses.  This is made possible by the way ions seal the lens when the coating is applied. 6

7. Hard coat are today a standard within an anti reflection coating lenses. Therefore lacquers are used which form an almost perfect buffer among the lenses surface and the extra brittle AR coating.  A high quality thermally cured hard coat gives the great scratch resistance and gives for the maximum long lasting component for an AR coating application. Both Side dip automated coated lenses for longer existence . 7

8. Coating thickness is exactly controlled with the aid of absolutely automized machine as a consequence giving lens highest quality scratch resistant assets. 8

9. Hard Coat Lens Hard Coat 9

10. Hydrophobic / Oleo-phobic Coat 10

11. Anti-Reflection Coating (ARC) Anti-reflective coating  is a microscopically thin multilayer coating that eliminates reflections from the front and back surface of eyeglass lenses.  AR coating is highly recommended for all eyeglass lenses, but particularly for polycarbonate and high-index lenses, which reflect more light than regular glass or plastic lenses if anti-reflective coating is not applied.  Also , aspheric lenses, which have flatter curves than regular lenses, often cause more noticeable reflections, so AR coating is highly recommended for these lenses, too.  AR coating improves light transmission through the lenses for night driving and helps photochromic lenses reduce glare in bright sunlight . 11

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16. Anti-reflective lenses can be recognized by the residual reflection. Regardless of the material used for the lenses, they have a characteristic color when you hold the glasses at a slight angle against a white background.  This means lenses with this residual reflection have the advantage of making your eyes look clearer to other people and have fewer reflections. Your eyes look more natural, almost as if you’re not wearing glasses at all. Ask for their tips about what you need to look out for to ensure your coating lasts as long as it ought to . 16

17. HOW DO ANTI-REFLECTIVE  LENSES WORK ? ANTI-GLARE LENSES: SHARP & CLEAR VISION WITHOUT REFLECTION Glare or the bright dazzling light can be quite uncomfortable and can make it difficult to see properly. This affects most of us multiple times a day, so protecting your eyes against it is quite important. That is where anti-glare glasses come into the picture. Anti-glare glasses are made with lenses that have an anti-reflective coating (sometimes referred to as AR coating or anti-glare coating). This is an extremely thin layer placed on the lens itself that removes any reflections you might normally see from the surface of your glasses (both on the front or the back). It also reduces glare and ‘halos’ around light sources that you may experience at night. Most anti-glare lenses are made with a special ‘hydrophobic’ surface treatment that seals the anti-reflective layers, which in turn allows the lenses to repel water, stopping water droplets from forming and making the glasses easier to clean. Once the reflections on your glasses have been eliminated, more light is able to pass through the lenses and improve the sharpness of your vision . 17

18. WHEN WOULD YOU NEED ANTI-GLARE LENSES ? As the anti-reflective coating reduces any light reflecting from your glasses, everyone can definitely benefit from getting anti-glare lenses, especially those who: Work consistently with computers, where prolonged work on the computer can strain their eyes Drive regularly, whether at night (when glare from the headlights of oncoming traffic can make it hard to see) or in the day (when bright sunlight can have the same effect) Work under bright sunlight Anyone who wears glasses should look into getting anti-glare lenses as they will be able to help in all everyday situations. Anti-glare glasses are particularly recommended for those who wear UV protection lenses or high-index lenses (thinner, lighter lenses for nearsightedness), as these glasses tend to reflect more light than regular lenses . 18

19. WHAT ARE THE BENEFITS OF ANTI-GLARE GLASSES ? There are many benefits of anti-glare glasses: With light reflections and glare removed, vision is sharper and clearer. As there will be less need to squint or strain the eyes, the effects of  eye strain  are significantly reduced. With anti-glare glasses reducing the levels of discomfort you might experience when sitting at a computer every day, you’ll likely be more productive and able to work at the computer for longer periods. An anti-glare coating make your glasses look more attractive, especially as your eyes will be more visible without the light reflections on your glasses. Making eye contact is much more achievable when wearing anti-glare glasses, which is important in many situations, both social and professional. 19

20. Similarly, anti-glare glasses can make taking photographs a lot easier; without reflections showing on your lenses, you’ll be able to get that perfect shot the first time. With anti-glare glasses, 99.5 percent of all light is able to reach the eye through the lenses, sharpening your vision and reducing distractions caused by reflections and glare. If you wear glasses and regularly experience glare, light reflections, or halos around light sources at night, you will definitely benefit from getting a pair of anti-glare glasses. Visit your eye care professional today to see what your options are and start experiencing better, clearer vision both day and night . 20

21. Scratch Resistance Coating (SRC) No eyeglass lenses — not even glass lenses — are scratch-proof. However, lenses that are treated front and back with a clear, scratch-resistant coating have a much harder surface that is more resistant to scratching, whether from dropping your glasses on the floor or occasionally cleaning them with a paper towel. Kids' lenses, especially, benefit from a scratch-resistant hard coat for greater durability. 21

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23. Today, most eyeglass lenses, including high-index lenses and lenses made of polycarbonate and Trivex, have a built-in scratch-resistant coating. Since scratch-resistant coatings are sometimes optional, make sure your optician knows that you want your eyeglass lenses to include hard coating for extra durability. Also, ask about the warranty on eyeglass lenses that are treated with scratch-resistant coating versus those without the coating. Keep in mind that even the best scratch-resistant coating can't completely protect your lenses from wear and tear. To keep your glasses looking new, store them in a cushioned case when not in use, and  clean your lenses  with a microfiber cloth and the cleaning solution your optician recommends. 23

24. Also, be wary of products that promise to repair scratched lenses. These products may fill in the scratches, but it is impossible for them to make the scratches disappear, so the lenses look new again. 24

25. HOW TO PROTECT YOUR LENSES FROM SCRATCHES ? There’s nothing worse than buying an expensive gorgeous pair of eyeglasses and then accidentally dropping them before you’ve even had the chance to show them off. They might not break, but the lenses are probably going to get scratched. However, while there are no 100% scratch-proof lenses - whether plastic or glass - you can find anti-scratch options. WHAT ARE ANTI-SCRATCH LENSES? Anti-scratch lenses are made by coating regular plastic or glass lenses with a hard protective layer. This coating is applied to the front and back of the lenses. Many eyeglass lenses today are treated with scratch-resistant coating during the manufacturing process. This is especially true with high-index and polycarbonate lenses.  High-index lenses  are much thinner and lighter than traditional ones. Polycarbonate lenses are a type of high-index lens that is impact-resistant and have built-in  UV protection . However, a scratch-resistant coating is optional in some cases, so it is best to let your optician know that you want that extra layer of protection. Additional high-quality coatings like  Crizal , can protect your glasses and ensure clear vision all the time . 25

26. BENEFITS OF SCRATCH-RESISTANT GLASS LENSES Scratch-resistant glass lenses are better than uncoated lenses in several ways. Anti-scratch lenses are: Less prone to getting scrapes and ugly scratches on the surface More durable and less likely to break upon impact Provide clearer vision for a longer period Have a prolonged lifespan, keeping your eyeglasses looking as good as new for longer 26

27. WHO NEEDS ANTI-SCRATCH LENSES ? Anyone can benefit from scratch-resistant glass, but there are people who need them more than others. If you live an active lifestyle - play sports or engage in outdoor activities regularly, for example - then you need eyeglasses that will be able to withstand physical contact and exposure to the elements. If you tend to leave your glasses lying around unprotected, or if you don’t usually use the case they come in, then you definitely need scratch-resistant lenses. 27

28. Scratch-resistant glass lenses are particularly suitable for the elderly since they are more likely to forget to take care of their eyeglasses properly. They may overlook using proper cleaning materials. Furthermore, they tend to accidentally drop their glasses. Kids are probably the ones who need anti-scratch lenses the most. They usually aren’t too concerned about taking care of their eyewear. If they have scratch-resistant lenses, you don’t have to worry about replacing their eyeglasses every time they get too excited in the playground or shove their glasses unprotected into their backpack pockets. 28

29. WHAT TO DO WHEN YOUR LENSES GET SCRATCHED ? Bear in mind that even scratch-resistant glass is not totally immune to scrapes and grazes, especially if you don't take good care of them. To avoid damaging your lenses, make sure that you clean them regularly and with the appropriate cleaning material. Use the cloth that comes with your eyeglasses - not your shirt, paper towels, or any other abrasive material. You may use mild detergent mixed with clean warm water or solutions sold at optical shops. Make sure you always put your glasses in their case when you’re not using them, even if you’re just placing them on the table. If your lenses do get scratched, you do not need to worry about having to spend money on a new pair immediately. In many cases, you can repair scratches yourself. If you do it correctly, you won’t do further damage and your glasses will be as good as new . 29

30. For minor scratches, you can use common household materials such as soft cotton cloth and non-abrasive toothpaste. Rub the scratches carefully in circles until they disappear. Use cold water to remove the toothpaste. Alternatively, use baking soda. Make a thick paste by mixing baking soda with water and follow the same process. If you have plastic lenses, you can use commercial glass etching compounds. For most products, simply apply gently, let it sit for five minutes, and then wipe the lens dry. Never use this for glass lenses, as it will do more harm than good! Car wax and windshield water repellent work well with both plastic and glass lenses. Use soft cloth - microfiber works best - to polish the affected lens. 30

31. Clean Coat Unfortunately, no coating will mean never having to clean lenses again. However, lenses can be coated in such a way that impurities are less likely to adhere to the lens. Clean Coat makes the lens surface smooth, making it more difficult for dirt and dust to adhere. This simplifies lens care tremendously. The smoother the lens surface, the better. Just like a lotus leaf, water beads right off thanks to the wetting properties of the coating. A great bonus, particularly for anti-reflective lenses, because you’re more likely to notice dirt through improved reflection reduction than on lenses without such a coating. Another coating level with antistatic function can also help keep your glasses cleaner: fluff – from clothes, for example – adheres to these lenses much less. 31

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33. Drive Safe Coat DriveSafe Lens Portfolio There is something captivating about driving a car. Yet many people still feel insecure and inadequately supported by their glasses in tricky conditions – such as during a storm, at night or at dawn or dusk. Traditional progressive lenses in particular are not optimum for driving a car. Using a combination of an optimized lens design and a special coating, ZEISS DriveSafe offers you a lens for everyday use with special features to make driving a more relaxed experience. Put your trust in ZEISS technologies for good vision when driving. 33

34. ZEISS DriveSafe lenses are a visual dream come true for many drivers . You can wear DriveSafe lenses like normal glasses for the entire day and benefit from these features for a safe driving experience. A more relaxed feeling when driving thanks to better vision in the challenging light conditions caused by low light or bad weather. Reduced discomfort glare for drivers who are frequently irritated by oncoming car lights and the scattered light from street lamps. For progressive lens wearers: optimum vision comfort when looking at the road, the dashboard, the rear-view mirror and the side mirrors. 34

35. For everyone who wants a more relaxed driving experience Whether we drive a lot or a little, good vision while driving is important to all of us. Driving in bad weather and tricky conditions is uncomfortable and stressful for many people. The demands placed on the optimum driving glasses are very similar. Drivers who wear glasses would like to have: better vision in bad weather, at night or at dawn or dusk less glare fewer vision problems when shifting focus DriveSafe meets this need for single vision and progressive lenses. The secret is: glasses with DriveSafe lenses are intended for everyday use and can be worn for the entire day.   Less glare from oncoming vehicles   Better vision in bad weather and at dawn or dusk 35

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38. Glasses for everyday use with a ton of know-how 1.ZEISS Luminance Design™ technology ZEISS DriveSafe features an optimized lens design that takes into account the size of our pupils in poor light. There is one lens design for single vision lenses and one for progressives. The result: improved and unimpaired vision when driving in poor light. Little light = Twilight vision with different pupil sizes: difficult conditions due to the variation in the depth of field Bright light = photopic vision with small pupil: Large depth of focus, relaxed space perception No light (darkness) = Night vision with large pupils: limited depth of field Little light = Twilight vision with different pupil sizes: difficult conditions due to the variation in the depth of field Bright light = photopic vision with small pupil: Large depth of focus, relaxed space perception 38

39. ZEISS DuraVision DriveSafe lens coating With DriveSafe, ZEISS has used a special new coating to take into account the many different situations during driving when our eyes are confronted with glare. The DuraVision ®  DriveSafe coating by ZEISS partially reflects wavelengths in the high-energy, visible portion of the blue light spectrum, including the band around the wavelength of 450 nm. DuraVision ®  DriveSafe Coating by ZEISS therefore reduces discomfort glare by up to 64%* compared to premium AR coatings . Poor light conditions increase glare and reflections. 39

40. Protection From Blue Light from Special Coat Our vision has changed enormously now that we use digital devices such as smartphones, tablets, and modern illumination through LEDs and displays. We are subjected to more blue light than ever – all day long, in fact. High-energy blue light is also believed to have a negative impact on vision over the long term. One thing’s for sure: Light has a considerable effect on managing our internal body clock, and thus our sleep patterns. Strong light in the early evening tells your body to stay awake for longer. When you look at the screen on your computer or another digital device, you subject your eyes to large quantities of blue light, causing such things as reduced contrast sensitivity. Focusing on a screen can also be strenuous for you and your eyes, and contribute to digital eye strain . 40

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42. Lenses can help protect your eyes against blue light thanks to a special filter, making it easier to work at a computer or use digital devices. Thanks to  DuraVision ®  Blue Protect  from ZEISS, you receive a premium lens coating together with a blue light filter, which is great for all wearers who are often indoors and find that the light emitted by LED light bulbs, TVs or computer monitors makes them tired or uncomfortable. It is therefore advisable to opt for this lens coating, even for glasses you need for work or when watching TV. 42

43. Infrared Blockage Coat 43

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45. 1. Patients concerned about their aesthetics for keeping their eyes healthy. 2.Those that use electronic device for 4-5 hours/day and have symptoms of fatigue or want to prevent them. 3.Users concerned about radiation protection. 4.Parents who care about their children’s eye health. 45

46. Benefits for the user 1. Aesthetic improvement thanks to the removal of the reflexes. 2. Healthier eyes, prolonging a clear & Healthy vision. 3.Prevents aging of the skin around the eyes. 4.Improves visual comfort. 46

47. Dust / Dirt Resistance Satin Plus’ Guard Technology makes the lenses almost dust free. Static electric charge accumulates on the lens surface and causes trouble such as dust attraction. The SD Guard Technology reduces the accumulation of frictional static charge by making the lens surface neutral, reducing dust accumulation. This is explained in the diagram below. 47

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49. Anti-Smudge Resistance There is nothing more frustrating than smudged and greasy lenses. After all, the whole point of wearing glasses is to have crystal clear vision, which is particularly crucial when you are performing a task that requires your complete focus, like staring at a computer or driving. But even when you are not working, you still need to be able to see clearly and smudged lenses just don't do the job. Luckily there is a simple solution to this problem - anti-smudge lenses. 49

50. WHAT ARE ANTI-SMUDGE LENSES ? Anti smudge lenses have a special coating that protects it from fingerprints and smudges, making it a must-have for spectacle wearers. Thanks to these lenses, you no longer have to constantly be rubbing ineffectively at your lenses with the tail end of your shirt or handkerchief. Interestingly, the technology behind anti smudge lenses came about after a survey conducted on a number of spectacle wearers highlighted this as a major issue for them. Anti smudge lenses work by having a special coating placed on top of the lens which stops smudges and dirt from sticking to the surface. In addition to protecting against fingerprints, the coating improves the strength and durability of the lenses, helping them to stay clean over time and also making them easier to clean. 50

51. WHAT ARE THE BENEFITS OF ANTI-SMUDGE LENSES ? If not having smudges on your lenses wasn’t enough of a selling point, the coatings on your lenses also ensures that your glasses stay cleaner for much longer and are more durable. Anti-smudge lenses benefit you in a number of ways: Clearer vision without smudges or dirt covering the surface of the lenses Easier to to clean Since you are not straining to see through fingerprints, there’s a reduction in  eye strain . 51

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53. WHEN DO YOU NEED ANTI-SMUDGE LENSES ? We all want clear and unimpeded vision for comfort and in some cases safety. Therefore preventing smudges from taking hold on your lenses is important to many. You will benefit from anti-smudge lenses if you: Work in a dusty environment (building site, farm, workshop…) where your hands are busy and you need clear vision Wear your glasses every day where there’s a greater chance of them being smudged or picking up dirt Take your glasses on and off regularly, making them susceptible to being covered in fingerprints Live and work in a busy city with higher incidences of dirt and dust in the air, the lens coating stops accumulation of grime 53

54. Water Resistance DO YOU NEED WATER-REPELLENT LENSES? You’re out and it starts drizzling. The rain-drops cover your glasses and you have to clean them constantly - an annoyance you really don’t need! The same happens when you’re splashing in the pool with friends or even washing dishes when some water droplets land in the middle of your glasses. What’s a spectacle-wearer to do? Luckily, there are water-repellent lenses, also known as hydrophobic lenses. 'Hydrophobic' means fear of water, a perfect name for such lenses. Switching to such lenses can help avoid problems with water, rain, and sweat on our glasses, which can hinder our vision and slow down your work or just be plain annoying. You can see the same hydrophobic properties on the wings of different kinds of insects, and that is why a dragonfly can travel unhindered when it’s raining, as their wings are able to repel the water droplets with their hydrophobic coating.   54

55. WHAT ARE WATER-REPELLENT LENSES/COATINGS? The water-repellent coatings of lenses like  Crizal  prevents water droplets from sticking to the lens. This is achieved by having a slight angle to the lens that causes the water drops to slide down and off. The smaller the angle, the more effective the slide-off - the optimum angle being around six degrees. These lenses are ideal for people who wear their glasses all the time, as there are many situations in which water can obscure their vision. HOW DOES THE HYDROPHOBIC COATING ACTUALLY WORK? Imagine droplets of water running down a particular surface. In the case where there is more friction, the droplets spread somewhat and stick to the surface. But when there is less friction, inhibiting the water droplets to join and increase in size, they run down and off the surface.  Water molecules are polar and tend to be attracted by other polar molecules, particularly other water molecules. Their hydrophobic properties create surface tension, and inhibit the surface from being covered – and so, therefore, when used on lenses, water is repelled. 55

56. WHEN WOULD I NEED WATER-REPELLENT LENSES ? Water-repellent lenses can be useful for everyone who wears glasses, but particularly: If you work outside or perform outdoor activities that would increase your chances of being in the rain Parents bathing their children definitely face challenges with struggling infants and splashing Even washing your car with a high-pressure hose can often create a mist in the air and create droplets of water on your lenses If you’re an athlete and sweating hinders your performance as it sticks to your glasses and blurs your vision There are so many activities or scenarios in which you can get your glasses wet, so having a water-repellent coating will save you the trouble of constantly cleaning it . 56

57. Mirror/Mercury Coat Mirror coating are applied to  lenses  by a vacuum application of interference layers and have higher percentage of luminous reflectance than their corresponding flash mirror colors to protect human eyes. Yash Lenses replicate  coatings  are engineered the use of dielectric process generation under managed vacuum situations to supply lenses that fulfill the increasing demand for more sun safety, guarding towards dangerous high strength seen light. It combines some of the cutting-edge technological improvements resulting in a long lasting, anti-static, slick and clean to easy premium first-class sun put on. 57

58. Yash Lenses’s reflect lenses include bottom AR with low UV mirrored image era that facilitates reduce demanding again floor reflections popular on darkish lenses and offer closing safety towards adverse returned-floor UV reflections. Yash Lenses  reflect coatings are to be had in solid and flash densities. Solid reflect coatings have better percent of luminous reflectance than their corresponding flash reflect colorations. The flash replicate usually has a touch of the color while a solid reflect shows a better density of the color. Mirror covered lenses from Yash Lenses soak up anywhere from 5 to 65% greater mild than non-mirrored lenses, relying on the coloration and density of coating . 58

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60. Anti-Fog If you live in a cold climate, nothing is more frustrating than having your eyeglasses fog up when you come in from the cold. This also can be a safety issue, since it limits your ability to see until the fog clears. Lens fogging can be especially dangerous for police and other first responders to emergency situations. 60

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62. Lens fogging is caused by tiny water droplets that form by condensation on the surface of eyeglass lenses when the lenses are significantly cooler than the surrounding air temperature. A number of companies make anti-fog sprays and coatings designed to reduce the condensation of moisture on lenses that causes fogging. So, your lenses and vision stay clear when you make the transition from a cold environment to a warm one. 62

63. Anti-fog coating also may keep your lenses from fogging up during sports and other times when you are hot and perspiring. Anti-fog coatings can be applied to plastic, polycarbonate and other eyeglass lenses, including high-index lenses and Transitions photochromic lenses. The coating is applied to the lenses before they are cut to fit into your frame at the optical lab. Ask your optical retailer about pricing and availability. 63

64. Fog Free Lenses  with a new advance technology with superior properties.  Fog Free Lenses  have a clear vision solution for multipurpose uses, it gives better efficient and optimal performance. By changing in environmental temperature, wearer faces the problem in daily routine work. In daily activities like driving, cooking, outing, office meeting and in many situations we face the problem of fog on lens. Foggy lenses are most common and inconvenient for many eye wearers. More than 70% of the eye wearer confirms fog issues. Fog Free Lenses  provides fog free and clear vision in daily activity . Features • Fog Free clear vision • Enhance light transmit • Scratch resistance • Special features of hydrophobic • Chemical and solvent resistant  64

65. OPTIFOG UV LENSES OPTIFOG UV BENEFITS Stay fog free You no longer need to suffer the inconvenience, embarrassment or danger of fogged-up glasses. Clean your Optifog lenses daily with the Optifog Smart Textile and washing them with water every two weeks. Stay fog free whatever the conditions, and get daily defense against UV to protect the long-term health of your eyes . OPTIFOG ®  UV FEATURES Anti-fog molecules applied to both surfaces of the lens are activated by our Optifog activator spray. So instead of creating a fog, water droplets form a film that’s invisible to the eye. Each spray lasts for up to a week. Our exclusive anti-reflective technology is also applied to both sides of the lens, protecting your eyes from direct and reflected UV light .   65

66. OPTIFOG : ANTI-FOG LENSES The latest technology for long lasting fog free vision. Anti fog coating is used to prevent the condensation of water in the form of small droplets on a surface which resembles fog This coating works either by the application of a surfactant film or by creating a hydrophilic surface. Lens fogging is caused by when the lenses are significantly cooler than the surrounding air temperature . so, to avoid fog of lens we use anti fog coating. 66

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68. Blue Coat 68

69. Sapphire 360° UV Coating 69

70. Green Coat 70

71. Purple Coat 71

72. Polarized 72

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74. Edge Coatings Applied to plastic lenses , Specially 3 Piece and Half Rimless fittings. It makes the edges of lens appear like the color of the frame . It is only used for a high minus lens . 74

75. Anti-Static Coating According to  Optometric Management , these two options are highly dependent on your occupation and lifestyle. An anti-fog or “hydrophobic” coating will keep moisture from accumulating on your glasses and prevent them from fogging up in moist environments. An anti-static coating will help keep debris like dust and dirt particles from sticking to your lenses in dry environments. 75

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