Lens Coating


Today’s lens applications enhance your vision and improve how your glasses look.  Reducing glare or preventing scratches are common applications for today’s lenses.  Like most things in life however there are products that perform better than others.  At Killingly Eye Care we feel it is our responsibility to inform and guide our patients to make the best choice for each individual.

Some of the coatings and lens applications we recommend are:


No material is scratch proof.  Not even glass lenses.  However some materials are more resistant to scratches than others.  Some of the lenses that are thin and lightweight scratch easier and should have a coating applied.

Lenses that are treated with a coating on both the front and the back surface will resist scratching.  Children’s glasses should always have a scratch coating.

No coating will totally prevent scratches though.  So you should keep your glasses in a case when not in use and clean them with a micro fiber cloth and the proper cleaning solution.

Scratches cannot be repaired.  There are products that claim to do this but all they do is temporarily hide the scratch.

An anti-scratch coating can lengthen the life of your lenses, while hydrophobic coatings keep rain, snow and fog at bay.


One of the biggest improvements in lenses has been the development of anti reflective coatings.  AR coatings as they are called are really a multilayered application (usually from 8-10 microscopically thin layers) that eliminate glare from the front and back surface of lenses.

Eliminating glare enhances your vision especially at night, making for better vision and more comfortable vision.

AR coatings are particularly recommended for certain lens materials.  Materials like polycarbonate and high index cause more reflections making AR coatings an essential.  AR coatings can also be applied to transition (light to dark or photochromatic) lenses reducing glare in high sunlight conditions.

There are different quality AR coatings and at Killingly Eye Care we will help you understand the difference in the available products so you can make an informed decision.


In cold climates or in certain jobs glasses are exposed to varying temperatures and they are prone to fogging up.  Not only is this annoying but it can be dangerous if machinery is being operated or driving is involved.

A coating can be applied that will eliminate fogging allowing for clear vision under changing climates.  This coating will also prevent glasses from fogging when exercising.  This coating can be applied to all types of lenses.


Another beneficial treatment is the UV blocker in lenses, which filter out the harmful UV rays that can cause cataracts and macular degeneration.  Most of us are very aware of the importance of using a sunscreen when out in the sun for any extended amount of time.  Our eyes require protection as well and the UV blocker protects our sensitive internal eye structures from the sun’s harmful rays.

While plastic lens themselves block most of the harmful UV light adding a UV blocking dye boosts the protection to 100 percent.  Polycarbonate and most high index lenses already possess 100 percent UV protection so adding the additional UV blocker is unnecessary.


These lenses are almost totally clear indoors and then automatically darken in direct sunlight.  They also protect your eyes from 100 percent of the sun’s harmful UV rays.  These lenses offer great convenience allowing you to get protection from the sunlight without having a separate pair of prescription sunglasses.

They are available in a wide variety of materials and they have different types of lenses (some getting darker outside than others).  These lenses are good for children who spend a good deal of time outside as they offer protection from the sun’s rays that can produce cataracts.  Protecting your child’s eyes when they are young may be a benefit to them when they are older


Polarized lenses are popular with boaters, fishermen and outdoorsman who require reduced glare off the surface of the water.  Many others though can benefit from polarized lenses.  Skiers, bikers, golfers are just a few of the activities that would benefit from the elimination of glare.  Even driving is a more pleasurable experience when you are not dealing with the glare from the hood of the car or the road’s surface.

Polarized lenses work by eliminating the light that reflects off a surface in a certain orientations.  There are some situations though were polarized lenses are not helpful.  They will make it very difficult to see light emitted by LCD’s (liquid crystal diodes) and some digital screens like ATM machines or your cell phone display.

These lenses can be a great enhancement for your outdoor experience.  We will be happy to advise you if these lenses would work for you.