One of the main concerns for anyone who wears glasses every day is that your corrective lenses will get scratched and ruined, which can be a significant expense if you have to pay to replace those lenses. Coatings have been developed for organic lenses to help increase the durability of eyewear.

What coatings do you need for your eyewear?

What coat­ings do you need for your eye­wear?

One of the main con­cerns for any­one who wears glass­es every day is that your cor­rec­tive lens­es will get scratched and ru­ined, which can be a sig­nif­i­cant ex­pense if you have to pay to re­place those lens­es. Just a few decades ago, the risk of drop­ping and break­ing your lens­es into a thou­sand pieces was much greater, giv­en that lens­es used to be made main­ly of glass, which made for beau­ti­ful lens­es, but they were also very frag­ile. Glass has since giv­en way to plas­tic (a.k.a. or­gan­ic) lens­es, which are more durable, but they are more sus­cep­ti­ble to scratch­es. As a re­sult, coat­ings have been de­vel­oped for or­gan­ic lens­es to help in­crease the dura­bil­i­ty of eye­wear. Some of these coat­ings are ap­plied to plas­tic lens­es by de­fault, such as hard­en­ing and anti-re­flec­tion coat­ings, while oth­ers can be added upon re­quest of the op­ti­cian. Let’s take a look at some of the char­ac­ter­is­tics that lens coat­ings can pro­vide:

HARD­EN­ING: Hard coat­ing is ap­plied to the sur­face of or­gan­ic lens­es to im­prove their re­sis­tance to scratch­es and to in­crease their dura­bil­i­ty over time. It is ap­plied by dip­ping the lens in a vat of spe­cial hard­en­ing enam­els of dif­fer­ent re­frac­tive in­dex­es. Al­ter­na­tive­ly, these enam­els may be ap­plied by way of a process known as spin­ning. hard.jpg

ANTI-GLARE: As the name im­plies, an anti-glare coat­ing (also known as anti-re­flec­tive, or “AR”, coat­ing) serves to block re­flec­tion from sources of nat­ur­al, out­door light (sun­light) or ar­ti­fi­cial light (car head­lights, TV and com­put­er screens). When dri­ving, for ex­am­ple, head­light glare is a ma­jor is­sue that can cause un­want­ed re­flec­tion on the in­ner side of the lens, which can in­ter­fere with our vi­sion by way of a phe­nom­e­non known as “ghost­ing”. This glare can be elim­i­nat­ed by ap­ply­ing an anti-re­flec­tive coat­ing, which elim­i­nates re­flec­tion on the sur­face of the lens and al­lows much more light to pass through the lens. In this way, we see more clear­ly and the lens is more trans­par­ent, which also makes it more aes­thet­i­cal­ly pleas­ing. In pro­duc­tion, the anti-glare process in­volves plac­ing a batch of lens­es in a high-vac­u­um cham­ber and then into a spe­cial ma­chine in which the var­i­ous crys­tals of the coat­ing to be ap­plied are va­por­ized. anti-reflective.jpg

ANTI-STA­T­IC: As the name im­plies, this coat­ing elim­i­nates sta­t­ic elec­tric­i­ty so that the lens doesn’t at­tract dust par­ti­cles. An anti-sta­t­ic coat­ing is typ­i­cal­ly in­clud­ed as a stan­dard treat­ment. anti-static.jpg

  • WA­TER AND OIL RE­PEL­LENT: Dirt and grime are the worst en­e­mies of our lens­es. There’s noth­ing worse than hav­ing those an­noy­ing smudges on our glass­es. A wa­ter-re­pel­lent coat­ing en­ables both sides of a lens to re­pel wa­ter and oily sub­stances. An oil-re­pel­lent coat­ing en­sures that the sur­faces of the lens are more** re­pel­lent to liq­uids and oily sub­stances**. These coat­ings are par­tic­u­lar­ly rec­om­mend­ed for sit­u­a­tions when you are like­ly to come into con­tact with oily sub­stances, such as in the kitchen, in an op­er­at­ing room, or at a con­struc­tion site. hydrophonic.jpg oleophobic.jpg

BLUE BLOCK: In re­cent years, de­mand for blue-light block­ing lens­es has grown ex­po­nen­tial­ly with the in­creas­ing use of elec­tron­ic de­vices. But what is blue light ex­act­ly? It is the por­tion of high-en­er­gy vis­i­ble (HEV) light in the range of 400 to 420 nanome­ters, which can, if not prop­er­ly fil­tered, cause per­ma­nent dam­age to the cornea and to the reti­na. There are lens ma­te­ri­als on the mar­ket that pro­vide blue-light pro­tec­tion on their own (such as our Blue Nat­ur­al, or this pro­tec­tion can be added as a coat­ing (such as our Chro­ma. It goes with­out say­ing that the first so­lu­tion is prefer­able in or­der to avoid the risk of a pro­tec­tive coat­ing be­ing worn away over time. Or­di­nar­i­ly, a blue-block coat­ing is ap­plied to col­or­less lens­es, but it is also known that the sun emits 20 times more HEV blue light, so sun­glass lens­es with UV and HEV pro­tec­tion, such as our No­HEV Light and Dark, are be­com­ing in­creas­ing­ly pop­u­lar. blue light.jpg

PHO­TOCHROMIC: A pho­tochromic coat­ing is what en­ables a lens to dark­en in re­sponse to am­bi­ent light­ing con­di­tions. Pho­tochromic lens­es are used a great deal all year round be­cause they adapt to light­ing con­di­tions so that they can be worn in­doors and out, so you don’t have to change glass­es. With our lens­es, you can se­lect from a com­plete­ly trans­par­ent base, such as our Fo­tochro­ma or Tran­si­tions lens­es, or a tint­ed base, with our Fo­to­col­or lens­es.

PO­LAR­IZED: This is an ex­treme­ly pop­u­lar coat­ing for sun­glass­es, es­pe­cial­ly among peo­ple who dri­ve a lot or play sports. And why is that? If you had a choice be­tween your nor­mal vi­sion and crys­tal-clear vi­sion with per­fect con­trast and no glare, which would you choose? Po­lar­ized lens­es are per­fect for min­i­miz­ing glare.

SEA­WA­TER: Used in par­tic­u­lar on sport lens­es, a salt­wa­ter coat­ing pro­tects the lens­es when worn at sea and pro­longs the life of the lens­es.

ANTI-FOG: Who hasn’t want­ed this over these last two years? Wear­ing glass­es with a face mask has been tor­ture for many of us, so anti-fog sprays — or ac­tu­al anti-fog lens coat­ings — have been sell­ing like crazy. But anti-fog coat­ings have been used for years in sports — es­pe­cial­ly in ski­ing and oth­er moun­tain sports — be­cause they keep lens­es from fog­ging up. You should al­ways ask your pre­ferred op­ti­cian to help you pick out the coat­ings that best meet your needs. Here -> all Di­v­el Italia’s Lens Coat­ings Here -> all Di­v­el Italia’s Lens Coat­ings for sun­glass­es