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what to expect from your new glasses
If you are getting eyeglasses for the first time, or getting a new prescription, please allow 1-2 weeks for your eyes to adjust to the new lenses. In the beginning, you could experience mild dizziness, headaches or even slight nausea. These symptoms are normal; however, if they persist, call your optician office.

If you experience any problems with your new frames, including discomfort on the nose or ears, return to your optician office for an adjustment. Also, your glasses should remain stationary on your face when you nod or turn your head. If your glasses slide down your nose or tilt to one side, they will be happy to adjust them for you. Please do not try to adjust them yourself.

caring for your new glasses
Always keep your glasses in a case when not in use. This will protect your lenses from scratched and will also help to extend the life of your frame.
To avoid scratching, never lay your lenses directly on any type of hard or abrasive surface.


Be sure to use two hands when putting on or removing your glasses. One-handed techniques are one of the most common cause of glasses coming out of alignment.


Never wear your glasses on the top of your head. This can cause your glasses to lose their shape.
Your glasses will last longer if you have them adjusted periodically. This allows us to check for loose screws or other possible problems. If your frame breaks, do not attempt to repair it with tape or glue. Bring it to us, and we will repair it properly.

Glasses are easy to break, scratch or damage so be careful!

cleaning your new glasses
Clean your frames and lenses on a regular basis.
Use a mixture of 50:50 rubbing alcohol and water in a squirt bottle. This is the best solution to remove any smudges or oils on the lenses. Then use a 100% cotton cloth or the provided microfiber cloth to dry them. 
To avoid scratching, never wipe your lenses when they are completely dry. Never use any paper
products, i.e., paper towels or tissues.[1]

How To Prevent Scratching Your New Glasses

 

There is nothing worse than spending $500 on a beautiful pair of glasses with high quality lenses and scratching them shortly after your purchase. Scratching your lenses is usually never covered under your warranty. That is because it is 100% preventable. So you may ask, what can I do to prevent scratching my glasses? Here are some steps to help keep your glasses looking new.

 

  1. Keep your glasses on your face and when they are not on your face put them into a glasses case.
  2. Do not drop your glasses. Large scratches are usually caused by dropping your glasses on a hard surface.
  3. Never store your glasses in your pockets or purse without them being in a glasses case. This includes your shirt pockets, jean pockets, or coat pockets.
  4. Clean your glasses regularly.
  5. Purchase and anti-scratch coating to help minimize scratches.
  6. Anti-reflective coatings can be scratch very easily. It is important to take extra good care of your glasses if you purchase an anti-reflective coating.
  7. Never use your shirt or any abrasive material or abrasive soap to clean your glasses.
  8. Never set your glasses down on an end table or nightstand without being in a case.
  9. Accidents happen and your glasses can easily be knock off a table and scratched or stepped on.
  10. For some reason children and dogs like to play with glasses…..to not let them!
  11. ALWAYS PUT YOUR GLASSES IN A GLASSES CASE WHEN THEY ARE NOT BEING USED. If your glasses are on your face or in a case you will rarely scratch them.[2]

 

An anti-scratch or scratch-resistant coating is a film or coating that can be applied to optical surfaces, such as the faces of a lens or photographic film. The coating does not interfere with how the lenses function and does not affect vision, but creates a permanent bond with the lens that reduces the appearance of hairline scratches which is common to eyeglass lenses.

 Though an anti-scratch coating is not 100% scratch-proof, it helps to prevent minor scratches that can easily happen to a regular lens. These minor scratches can damage the surface of the lens and impair vision. An anti-scratch coating acts as a protective layer thus making the lenses more durable.[3]

 

Reference: eResearch by Navid Ajamin -- summer 2012 

  1. drdodgeod.com
  2. visiononesource.com

Image: woodbridgeoptometry.com conlons.co.uk happleopticians.com www.cvoptical.com 1234eyes.com

 

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 | 2014 © ^ نوشته شده توسط Navid Ajamin | 

In chemistry, hydrophobicity (from the Attic Greek hydro, meaning water, and phobos, meaning fear) is the physical property of a molecule (known as a hydrophobe) that is repelled from a mass of water.

 

Hydrophobic molecules tend to be non-polar and, thus, prefer other neutral molecules and non-polar solvents. Hydrophobic molecules in water often cluster together, forming micelles. Water on hydrophobic surfaces will exhibit a high contact angle.

Examples of hydrophobic molecules include the alkanes, oils, fats, and greasy substances in general. Hydrophobic materials are used for oil removal from water, the management of oil spills, and chemical separation processes to remove non-polar from polar compounds.

Hydrophobic is often used interchangeably with lipophilic, "fat-loving." However, the two terms are not synonymous. While hydrophobic substances are usually lipophilic, there are exceptions—such as the silicones and fluorocarbons.[1]

  

thin layers of a waterproof substance on the surface of hydrophilic materials. Hydrophobic coatings are often called water-repellent, which is incorrect, since the water molecules are attracted to the coatings, although extremely weakly, rather than repelled by them.

Hydrophobic coatings are produced in the form of monomolecular layers (adsorbed orientated layers one molecule thick) or lacquer films by treating a material with solutions, emulsions, or less frequently, vapors of hydrophobic agents, which are substances that interact weakly with water but attach themselves firmly to a surface. Substances used as hydrophobic agents include salts of fatty acids and such metals as copper, aluminum, and zirconium; cation-active surface-active agents; and low-and high-molecular-weight organosilicon and organic fluorine compounds.

Hydrophobic coatings protect various materials (metal, wood, plastics, leather, and fabric and nonfabric fibrous ma-terials) from the destructive action of water or wetting. They are used particularly extensively in machine building,construction, and textile production.[2]

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 officers and other first responders to emergency situations.

At least one eyeglass lens coating company (Opticote) has created a permanent coating designed to eliminate this problem. The factory-applied coating — called Fog Free — eliminates 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. It may also keep your lenses from fogging up during sports and other times you are hot and perspiring.

Fog Free can be applied to plastic, polycarbonate and other eyeglass lenses, including high-index lenses and Transitions photochromic lenses. The anti-fog 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.

In October 2011, Essilor introduced a line of eyeglass lenses called Optifog, which the company describes as "a breakthrough lens with an exclusive anti-fog property."

The anti-fogging property of Optifog lenses is activated by applying a drop of Optifog Activator to each side of the lens, then wiping the lens with a microfiber cloth to thoroughly spread the liquid across the entire lens surface. This treatment keeps the lenses fog-free for up to one week, according to Essilor.

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. Optifog works by uniformly spreading these water droplets across the lens surface so they become invisible, Essilor says.

Optifog lenses are available in plastic, polycarbonate and high-index plastic lens materials, with or without Essilor's proprietary Crizal anti-reflective coating.[3]

Image: www.oakley.com www.optifog.com 

Reference: eResearch by Navid Ajamin -- spring 2012

Related To: Hydrophobic and Super Hydrophobic ;Anti-Reflective Coating for Eyeglass Lenses


 | 2014 © ^ نوشته شده توسط Navid Ajamin | 

Many people spend a large amount of time in the office just dealing with computers. It is not few to see white-collar workers to have all kinds of problems relating to eyes. Maybe they just use their eyes too often. But that is really unjustified. Everybody uses their eyes everyday and no less often than the white-collar workers. The problem lies in the computer screen. Many people say the LCD has less radiation, but the problem is the radiation is always there. In order to solve the problem, a lot of methods have been tried, such as place a plant near our computer, but the result is not satisfactory. Actually, wearing computer glasses is the best and easiest way to fight against computer radiation. There might still be some left, but very little. Many people are against the idea that computer glasses can absorb computer radiation. Many of their ideas are unfounded. Here let’s review something that is of vital importance relating to computer glasses.

Why Are Computer Glasses Lenses Anti-radioactive?


Essentially, computer glasses lenses are totally different from general prescription glasses in the way that the lenses are designed. The lenses have been coated with anti-radioactive coatings that have been added with some compound medium. Computer radiation comes from electromagnetic wave that has certain wavelength and amplitude. The working of anti-radioactive coatings has been based on the working theory of the electromagnetic wave, which the amplitude (if two amplitudes are the same) will be strengthened when the wavelength is the same and offset when the wavelength is opposite. Based on this theory, the computer glasses lenses have been coated with many anti-radioactive coatings to generate electromagnetic waves that are of different wavelength to intervene one and another and thus reduce computer radiation.[1]

 If you work at a computer for a significant amount of time each day, you may benefit from a pair of special reading glasses known as computer glasses. Even though you wear glasses or contacts on a daily basis, they are probably not quite right for your work at the computer. Computer glasses are special glasses prescribed to lessen the symptoms associated with computer vision syndrome (CVS). CVS describes a group of symptoms caused by prolonged computer use. Symptoms appear because the eyes and brain react differently to words on a computer screen than they do to printed text. Symptoms often include eyestrain, dry eyes, headaches and blurred vision. Many people try to compensate for these vision problems by leaning forward or by looking down to see through the bottom portion of their glasses, often resulting in back and shoulder pain.

Symptoms of CVS can also be caused by presbyopia, a vision disorder that develops as we age. Presbyopia is the loss of the eye's ability to change focus to see near objects, and usually becomes noticeable around the age of 40. If you think you might be feeling some of the symptoms of CVS, you may need to purchase a pair of computer glasses. Computer glasses are prescription glasses specially designed to allow patients to work comfortably at a computer. Computer work involves focusing the eyes at a close distance. Because computer monitors are usually placed a little further away than a comfortable reading distance, standard reading glasses are usually not enough to alleviate symptoms of CVS. With computer glasses, the whole lens focuses at the same distance and does not require you to tilt your head back to see the computer screen.[2] Image: revisionworld.co.uk chinaeye.com

Reference: eResearch by Navid Ajamin -- winter 2012


 | 2014 © ^ نوشته شده توسط Navid Ajamin | 

There are over 143 million adults in America who wear glasses. Many of these adults opt to have an anti-reflective coating applied to their lenses for a variety reasons. Anti-reflective coating not only improves the appearance of the glasses but also the vision seen through the lenses. Additional benefits of anti-reflective lenses include durability, heat resistance, aid in night driving, easy cleaning, and resistance to scratches.

The highest quality anti-reflective coating has a hydrophobic, or water-resistant, layer that is made to prevent water spots from developing on the lens and also makes them much easier to clean. Some anti-reflective coatings also have an oleophobic, or oil-resistant, layer that resists oil from the skin and once again makes it easier to clean smudges off of the lenses.

Today, anti-reflective coatings have even become very popular with sunglasses. When applied to the backside of the sunglass lenses, anti-reflective coating reduces the reflections of the sunlight into the eyes when the sun is coming in from behind.

There are many reasons why an anti-reflective coating is added to the lenses of a pair of glasses or sunglasses. This coating is often chosen for appearance, as it improves transparency and reduces the reflections in the glasses. The anti-reflective coating on lenses makes it easier for a glasses wearer to have direct eye contact with someone else without all of the distractions of reflections.

The anti-reflective coating helps improve driving safety, especially at night, by eliminating distracting headlights and streetlights. This allows drivers to focus more on the road. eResearch by Navid Ajamin

Also, while working, the unnatural and artificial lights found in many offices can quickly cause eye fatigue. Using a computer likewise puts great strain on the eyes. Having an anti-reflective coating applied to lenses will help to protect the eyes while working.

Last but not least, an anti-reflective coating on a lens enhances the quality of a lens and also lengthens its lifetime by providing durability and resistance to water, dirt, and scratches.

Images: iris.ca ; s3-media2.ak.yelpcdn.com ; ehow.com

 Reference: www.justeyewear.com 


 | 2014 © ^ نوشته شده توسط Navid Ajamin | 

Eyeglasses in various types have different benefits. Prescription eyeglasses are mainly for vision correction and sunglasses are particularly designed to offer protection from UV light. Some people simply wear eyeglasses for a stylish look. Currently eyeglasses are available in a variety of lens materials and frame materials. There are also some lens coatings such as anti-reflective coating and scratch-resistant coating and so on.

One of the common concerns from eyeglass wearers is that whether anti reflective coating is necessary. In general, the answer is yes. This coating applied on lenses can prevent excessive light from entering the eye. Without proper control of the intense light, the pupil will experience unnecessary strain.

Another advantage of anti-reflective coating is that it can address the problem of halo effect around the headlights of the opposite vehicles during night driving. This effect is quite dangerous because the vision can be distracted. Anti-reflective coating on a lens can effectively deal with this problem.

Computer users can also greatly benefit from lenses with anti-reflective coating. Regular computer users have probably experienced the bothersome glare from special parts of the PC monitor. They are forced to strain the eyes in order to get clear vision, which may lead to irritation or dry eyes. Anti-reflective coating performs well in eliminating glare. Anti-reflective coating is also believed to reduce eye pressure in dim light conditions.

In addition, eyeglasses with anti-reflective coating are particularly favored by individuals who like taking photographs. A disappointing defect of ordinary eyeglasses is that the outside images will hide the eyes while taking a photo. Anti-reflective coating can effectively block out the reflected images. This feature is very exciting and handy for photographers.

On the other hand, glasses with anti-reflective coating also need special care. While offering those benefits described above, anti-reflective lenses are easy to scratch, pick out fingerprints and become dirty. Wearers should use special cleaning tools, rather than ordinary cloth that may cause scratches.

Reference: www.articlesbase.com 

Image:www.prescriptionglassesonline.net www.conlons.co.uk


 | 2014 © ^ نوشته شده توسط Navid Ajamin | 

Anti-Reflection Coatings

 

  • What is Anti-Reflection Coatings?
  • What are the benefits of Anti-Reflection Coating?
  • Does it help with night driving?

   

These are some of the questions that we will answer.

  1. AR coatings are similar to the coatings found on microscopes and camera lenses. They consist of several layers of metal oxides applied to the front and back lens surfaces. Because of the layering effect, AR coatings sometimes have a hint of green or purple color, depending on the individual manufacturer's formula.
  2. The most important benefits of anti-reflective (AR) coating may be the unseen advantage--relief from fatigue and eyestrain caused by glare. AR does have a big cosmetic advantage, but removing the distracting reflections and ghost images that contribute to eyestrain clearly is a bigger benefit. This increases comfort. Being more comfortable in anything we do is a benefit, especially wearing glasses. People always remark how uncomfortable glasses are. Well now you can offer a real solution to that problem. AR Coating!!
  3. Nighttime driving is also enhanced with AR coatings by eliminating the reflections from street lights, headlights from on-coming vehicles, and taillights. By applying an AR coating more light can pass through the lens providing greater image contrast and clearer vision.

 

Beyond these benefits and features, other ideal candidates are:

  1. High Index Wearers-AR helps reduce the concentric rings these strong prescriptions produce.
  2. Low Vision Patients-The increase of light transmission from AR coatings can benefit low vision patients.
  3. Light-sensitive patients
  4. Sunglass wearers
  5. First time wearers of glasses
  6. Professionals
  7. VDT users can benefit from AR's ability to reduce glare.

You get more out of life when you can enjoy it longer. Vision problems such as glare, reflections, ghost images and the fatigue they create reduces your enjoyment. AR coatings improve vision, reduce fatigue, and help you to enjoy every minute of life at work or at play.

AR coatings enhance appearance. It makes lenses look thinner by reducing distracting reflections. Also the wearers eyes are more visible and this improves eye contact for better communication.

Now, we have mention the cosmetic and comfort features but there are more than that. AR lenses when worn in daylight and indoors, most people find it provides noticeable better visual performance, making objects appear crisper and brighter. When reading a newspaper, magazine, or even a computer screen with AR coated lenses images and letters will appear sharper and crisper. [1]

 

Anti-reflective eye glasses are designed to reduce glare on the lenses. This serves the dual purpose of improving the wearer’s vision and enhancing the appearance of the glasses themselves, particularly in photographs taken with a flash.

Composition

1. Anti-reflective coating consists of a series of layers of metal oxides. In the 1980s and 1990s, when anti-reflective lenses were relatively new, the coating was only a single layer that could easily become scratched or smudged.

Today, multiple layers enhance the properties of the anti-reflective coating, including oil-resistant, water-resistant, static-resistant and protective scratch-resistant layers.

Process

2. The process used to apply anti-reflective coating varies depending on the manufacturer. In some cases the coating is sprayed on in liquid form, then exposed to high heat so that the liquid solution hardens and adheres to the lens.

Another process coats each lens with a liquid and places it inside a vacuum chamber, where the vacuum process hardens the coating. In yet another process the anti-reflective coating is built into the material and distributed throughout.Care

3. Anti-reflective lenses require a little more care than regular lenses. They should not be cleaned with harsh chemicals, which can damage the anti-reflective coating. Additionally, they should be cleaned or rubbed only with a wet cloth, as a dry cloth can scratch the lens.[2]

 

eResearch by Navid Ajamin -- spring 2008

Image: powervisionoptical.com familyeyecarecenternc.com calgaryoptometry.com triangleeyecare.com

Reference: 1.robertsonoptical.com 2.milenyumtasarim.com

 

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 | 2014 © ^ نوشته شده توسط Navid Ajamin | 
 
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نوید عجمین Navid Ajamin

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What is dyslexia
Protective Eyewear
آب سیاه چشم/گلوکوما/Glaucoma
نکاتی در مورد تنبلی چشم
سردرد و نارساییهای چشمی
Eye Problems Flow Chart
Polaroid Eyewear عینک پلاروید
Ultraviolet التراویولت
عینک Eyewear
Dispensing Optician
CE mark
Pterygium, Pinguecula ,Chalazion and Sties
خوراکیهای مفید برای تقویت چشم
Coherence of Light وابستگی نور
Continuing Education
Optical engineering
Effects of Cigarette-Smoking
orthoptic softwares_بینائی درمانی
The Cause of Internet and TV Addiction
Opticians Association
Ophthalmic Research Center_SH.Beheshti Uni.
مراکز خیریه Charity centers
مركز تحقيقات چشم Eye Research Center
 

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