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Progressive lenses are multifocal lenses that look exactly like single vision lenses. These lenses correct the vision gradually and seamlessly from top to bottom at all distances. As a result, one does not notice a change in the focal position of the lens. So there is no need to change glasses when doing things like driving (far vision), looking at the computer (middle vision) and studying (close vision).Design of the Progressive lensesProgressive lenses have three parts. Unlike bifocal and trifocal lenses, there is no visible line that separates the parts. With progressive lenses, you look through the top section of the lens to see things that are far away. The middle section of the lenses clarify objects in the middle ground. The bottom section helps you see objects that are close up.Who Should Use Progressive Lenses?Progressive lenses are recommended for people with both astigmatism and myopia or hyperopia. People over the age of forty who suffer from presbyopia should also use these types of lenses instead of bifocals or trifocals, but if you only have myopia or hyperopia, the use of progressive lenses is not highly recommended.Pros and Cons of Progressive LensesLike all types of lenses, progressive lenses have their own pros and cons:Pros:&middot It provides clear vision at all distances (rather than at just two or three distinct viewing distances)&middot It eliminates bothersome "image jump" caused by bifocals and trifocals. This is where objects abruptly change in clarity and apparent position when your eyes move across the visible lines in these lenses. This sudden change causes blurred vision, dizziness, and nausea. With progressive lenses, image jump does not occur.&middot Because there are no visible "bifocal lines" in progressive lenses, they make you look younger, comparing to bifocals or trifocals (this reason alone may be why more people today wear progressive lenses than the number of people who wear bifocals and trifocals combined.)&middot You do not need to purchase multiple pairs of glasses &middot It helps you save money since you only need one pairCons:&middot You have to look in a specific part of the lens to see clearly at different distances&middot It can take time getting used toBlue Control CoatingAs mentioned earlier in the article, Blue Light can be useful or harmful, and it is classified in the range of visible lights. Our eyes receive a lot of blue light from our surroundings every day. Sunlight, light reflected from LCD screens, tablets, mobile screens, etc. All these devices have blue light rays and our eyes can be damaged if they are exposed to too much blue light, especially at night. Nowadays, special glasses are prescribed to protect the eyes from blue light, which ensures the health of the eyes against these rays.Progressive Blue Control Made by HottaHotta has created a new and modern world in front of your eyes by making progressive blue control lenses. These lenses are hydrophobic and protect the eyes from ultraviolet rays. The special electromagnetic resistance protects the eye from these rays. Hotta lenses are very light and provide very clear vision with their anti-fog and anti-dust properties.

Progressive, Photochromic, Blue Control LensesBuying proper glasses requires enough knowledge about the specifications of the glasses. There are many different types of lenses on the market today, each created by different technologies. Each of these technologies is used to improve the different lifestyles in the modern world. Better knowledge of these technologies will lead to better selection and purchase of glasses. In this article, we introduce the technology of progressive lenses, photochromic and blue control. Familiarity with these features makes you choose glasses that have all the three technologies mentioned below, so instead of buying three different pairs of glasses, you can get only one buying the right glasses will help you save money.Progressive LensesProgressive lenses are multifocal lenses that look exactly like single vision lenses. These lenses correct the vision gradually and seamlessly, from top to bottom, at all distances. As a result, one does not notice any changes in the focal position of the lenses, and so there is no need to change glasses when doing things like driving (far vision), looking at the computer (middle vision) and studying (close vision).Photochromic LensesPhotochromic lenses are special types of lenses that start out clear and turn dark in the bright sunlight. They offer a convenient way to protect your eyes outdoors from UV rays and bright light without having to carry around a pair of sunglasses.Photochromic lenses rely on silver chloride or silver halide to react to UV light and darken. This technology offers lenses which are darker outdoors and fully clear indoors. They return clear fast as well without compromising the quality.Photochromic lenses are available in a range of materials (e.g. glasses, polycarbonate or plastic).Photochromic performance can be influenced by temperature, so lenses can also take longer to adjust in the cold. This feature can be annoying, especially when one is using them inside vehicles.Blue Control LensesBlue light is at the end of the white light spectrum. The wavelength of the blue light is short and very energetic. Although exposure to blue light is normally beneficial to human health, overexposure to this light is harmful to humans. In addition to sunlight, digital screens such as LCDs and LEDs, mobile screens, tablets and computers are other sources of blue light. Today, the modern life requires the daily use of these devices, and so people's eyes are exposed to blue light rays more than usual. To protect the eyes from these rays, glasses with a protective cover against blue light are usually recommended.Progressive, Photochromic, Blue Control Lenses Made By HottaAs mentioned above, different technologies are used in making different glasses. By combining these technologies, Hotta has created glasses that have the characteristics of all three mentioned technologies. In fact, with the use of progressive lenses with photochemical coating and blue light control, it is no longer necessary to use three separate glasses for different situations. In addition, these lenses protect the eyes from ultraviolet rays and electromagnetic waves. Also, the anti-dust and anti-fog properties in different weather conditions provide a clear vision. By choosing these lenses, you can have up-to-date and smart glasses for your daily life.

From early morning until late at night we are using all kinds of digital devices, for work as well as for recreation. Think about laptops, tablets, smartphones and televisions. As we access most of these devices at a short distance, our eyes are increasingly exposed to the light emitted by the screens of those devices. Moreover, this requires our eyes to switch continuously between photos, illustrations and text or follow moving images.Research* has shown that more than 34% spend 4 to 6 hours a day with digital devices, while 14% even spends between 10 and 12 hours a day. It is therefore not surprising that more and more people complain about:Red and irritated eyesDry eyesBlurred visionFatigueBack, neck and shoulder painHeadaches*2012 VisionWatch Findings: A survey among 10,000 adults across America about their use of digital media and symptoms of vision stress, conducted by The Vision Council.Blue lightLCD and LED computer and television screens, smartphones, tablets and GPS devices all emit blue light, also known as high energy visible light As the quality of such screens improves continuously, their blue light emission is increasing. Although blue light in itself is a natural phenomenonndash; it is present in daylight and helps us to stay awakendash; excessive amounts can have an adverse effect and cause eye strain and fatigue.Blue controlBlue control is a blue light filter built into the material of your optical lenses to neutralise blue light emitted by LCD and LED screens as well as other digital devices, fluorescent and LED light globes. This helps prevent eye fatigue and eye strain caused by exposure to blue lighmdash;especially from use of digital devices. If you spend a lot of time in front of a computer, blue control lenses are a fantastic choice as they offer more comfortable vision and better contrast perception. Yorsquo;ll definitely notice the difference.BlueControl is offered in combination with unsurpassed Diamond Finish anti-reflection coating. This durable coating layer offers 75% more scratch resistance than its predecessors and adds even more comfort to lens wearers.Product features :&middot Neutralises blue light, preventing from eye strain and fatigue&middot Reduces glare for more comfortable and relaxed vision&middot Better contrast perception, offering a more natural colour experience&middot Plus all the features of Diamond Finish! This is a protective coating that reduces the blue light emitted by digital screens. It is the optimal solution for the large group of users who come into contact with digital screens throughout the day, including students, gamers, young professionals, office workers, and children. As well as protecting the eyes, the coating provides higher contrast and a more relaxed viewing experience.our research* shows that when they are made aware of the harmful effects of blue light, 78% of patients find blue light control lenses attractive and 58% have the direct intention to visit an optician for more information.The eyeglass wearer will benefit from :&middot Enhanced contrast, improving clarity and color perception&middot Reduced glare for more comfortable and relaxed vision&middot Reduced blue light, preventing eye strain and fatigue

Photochromic Blue Control Lenses:In spring and summer with increasing the sunlight during day, our eyes are exposed to harmful UV rays. Today all of us know about necessity of using sunglasses for long periods of time in the sun. In the other hand for moving constantly between indoors and outdoors, photochromic glasses could be a better option.What is photochromic lenses?Photochromic lenses are a special type of lens that starts out clear and turn dark in the bright sunlight. They offer a convenient way to protect your eyes outdoors from UV rays and bright light without having to carry around a pair of sunglasses.Photochromic lenses relied on silver chloride or silver halide to react to UV light and darken. The innovation technology offers lenses which are darker outdoors and fully clear indoors. They return clear fast as well without compromising on quality.Photochromic lenses are available in a range of materials (e.g. glasses, polycarbonate or plastic).Photochromic performance can be influenced by temperature, so lenses can also take longer to adjust in the cold. This feature can be annoying you specially while using them inside vehicles.Photochromic and blue light control:In the article (blue light; good or bad) we described completely about blue light and its effect on eyes. Modern technology innovated photochromic lenses which block harmful blue light and protect eyes. So lersquo;s say your photochromic lenses no only could be as your sunglass but also could be your computer glass as well. In this case you can save more money by using one pair of glasses which benefit in different situation.Medical Hint; See your eye care professional to discuss about your situation and find which type and brand of photochromic lenses is best for your specific needs.Photochromic Blue Control made by hotta:Hotta photochromic lenses are high-quality eyeglasses which has UV protection for eyes. Hotta vision offers an aspheric design so you will have a soft and thin lenses. With hydrophobic and green anti-reflex coating hotta lenses will be a great every day solution.

Best way to protect your eyesThe article (blue control: good or bad) describes how to protect eyes in digital age. It recommends that if you spend much time with digital screens, it is best to use blue light protection. If you are looking for a glass which keep your eyes safe against blue light and is impact-resistance, polycarbonate-lenses could be a great option. In this article we will cover what polycarbonate lenses are made of and who are the useful for. so let's get started.What is polycarbonate?Polycarbonate is a new technology introduced by aerospace industry and currently is used for helmet visors astronauts. Polycarbonate lenses offer lots of benefits so they are good choices for swimming goggles and diving masks. What makes polycarbonate such productive? Polycarbonate eyeglass lenses arelighter and 10 times more impact-resistant than glass or regular plastic lenses, which makes eyeglasses with polycarbonate lenses more comfortable to wear. The polycarbonate material is a natural UV filter, blocking over 99 percent of the sun's damaging UV rays without the need for special lens coatings.Who are the polycarbonate lenses suitable for?If you have a lot of activity during the day and your glasses are constantly falling, or as a child's parent you are looking to provide the best and safest lenses to protect and care for your child's eyes, polycarbonate lenses are the best option. Combination of lightweight comfort, UV protection and impact resistance makes these lenses an excellent choice.Medical hint: If you are looking for glasses for your child, in addition to choosing the most comfortable frames for them, irsquo;s beneficial to apply anti-reflective coating to the lenses as well so that you have the combination of best appearance and vision.Polycarbonate lenses made by Hotta vision:Hotta vision polycarbonate lenses not only filter UV rays but also blue light as well.They are highly resistant to impact, lightweight and thin. Hotta lenses offersuper hydrophobic lenses with green anti-reflective coating. With all these feature they are an ideal choice for you

HCT (Hard Coated tinted) lenses;Medical lenses has changed a lot over time. In the past, they were made exclusively of glass.but to satisfy needs of different customers, innovating technologies are used.Today, most are made of high-tech plastics. These new ones are lighter, dorsquo;t break as easily as glass, and can be treated with a filter to shield your eyes from damaging ultraviolet (UV) light.Today companies offers different type of lens coating (e,g: Anti-Reflex, scratch-resistance, UV protection) which help protect your vision by offering different benefits however it may affects the cost of your eyewear.What is Hard-Coat (HC)?Plastic lens materials scratch easily than glass materials. Scratched lenses ar really distracting. They may affect your vision clarity. So manufactures produce lenses which are treated with a hard coat. This added layer, reducing scratches for clearer and safer vision. Kids' lenses, especially, benefit from a hard coat for greater durability. Remember this layer does not protect you from light reflection.Hint: hard coating regularly is used for plastic lenses to increase their durability and protect them from scratches. Modern technology offers a new material to produce medical lenses, namedldquo; Polycarbonatrdquo;. It is very strong, very light, and resistant to scratches and breaking. To benefit more, you can use a hard coat on your polycarbonate lense. For more information you can read (protect your eyes) article.Color Hard Coat Tintable (HCT):By adding a cosmetic tint to your glasses you can improve the appearance of the lenses. These tints offer a variety of colors and shades. these tints will enhance your visual performance. This layer is softer than normal coating layer.Color Hard Coat tintable (HCT) made by hotta:The special HCT Lenses by hotta vision benefits scratch resistance. With these lenses you will improves your appearance with offering a safe vision. hotta lenses has a built-in coat which protect your eye against harmful uv rays. You will have an unique experience with these lenses.

What is Anti-reflex lenses?Sometimes after taking photos, if you wear glasses, the light bounces of your lenses and makes it difficult to see your eyes. Or may be you had difficulty during driving at night. But why this happens? when we use glasses, regular lenses allow light to pass only for 92 percent. It can make it difficult to see properly specially in low-light conditions such as driving at night.The modern technology, anti-reflective coating can eliminate the reflection of light and allow about 99 percent of light to pass. This extremely thin layer reduces glare andldquo;halorsquo; around light sources at night. What is HMC technology?HMC is a multi-layered combination of multiple coatings, which covers the plastic lenses in a certain condition. This type of lenses are thinner and more lightweight than the tradition glass lenses. Performance of hard coat lenses offers you high quality scratch resistance. Beside of an AR coating, not only the optical performance enhances but also the life of the lens. Anti-Reflex benefits:Anti-reflex coating reduce glare that reflects of your lenses. So this modern technology not only improves your vision, but also makes your eyeglasses literally invisible making it easier for you to have better eye contact with people in different situations. As mentioned before, AR allows more lights to pass through your lenses, so your eyes will be more comfortable in all lighting conditions (e.g; night or dark situations).If you spend a lot of time working behind a computer, you might benefit from an AR coating that filters out blue light. This combination improves vision clarity while reducing eye strain. Although AR improves durability of your lenses because of irsquo;s scratch-resistance, in the case with blue light cut, life time of your glasses decrease and you have to test your lenses after one or two year.Anti-Reflex lenses made by Hotta;Hotta vision offers a complete portfolio of Anti-Reflective coating with superior visual performance, clarity, scratch-resistance and durability. It protects your eyes against uv400 rays. With EMI coating, the discomfort you may experience during working with digital screens will reduce due to blue light cut. Hotta vision lenses are loaded with a super hydrophobic coating which makes them smudge free. So we can say these Hotta lenses are perfect for everyday use.