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Prescriptions

     

 

The various lens materials that are available for your prescription eyewear.


Plastic Lens


Plastic lenses are fantastic for prescription eyeglasses and prescription sunglasses due to their tint factor. These lenses are very light weight, and could be made into any prescription (Rx). Most individuals refer to this lens as the "Standard" or "Regular" or "Plastic" Lens.

The CR-39 allyl diglycol got its patent in carbonate monomer in the year 1945 marked a cardinal milestone in the evolution of the optical industry. A "monomer" from Greek mono "one" and meros "part" is a atom or a tiny molecule which may chemically bind to other molecules to form a polymer. A polymer as you remember from science class is a large molecule composed of repeating structural units. This brand new invention inspired a great deal of creativeness and ingeniousness.

The age of plastic led to tons of the great plastic lens merchandise that is available today. Plastic lenses that are produced from CR-39 allyl diglycol carbonate monomer, combine optics from glass along with the superior,thermal,mechanical and chemical properties resistance of the thermosetting material. The CR39 monomer is widely used for producing plastic lenses for both prescription eyeglasses and prescription sunglasses . CR-39 Plastic plastic products require complete resistance to high abrasion among other properties.

Plastic lenses formed from the CR-39 monomer provide to a lesser extent chromatic optical aberration compared to polycarbonate lenses, proven by tests measured by the Abbe number. The Abbe number is a measuring variable which expresses the deviat effect of optical glass on light from different wavelengths.

In conclusion, The Plastic Lens is very light weight compared to any of the other materials, and could easily be made into any prescription. The Plastic Lens is not recommended for rimless frames.

Polycarbonate Lens


Polycarbonate lenses also known as "poly lenses" are designed to be the most impact resistant material. Polycarbonate material is a type of group of the thermoplastic polymers. Polycarbonate is easily molded and transformed into any shape. Since it is lightweight its generally recommended for children, sports, as well as for rimless frames. The history of this lenses goes back to it ben originally used for industrial safety glasses.

With the technological advances of the 20th century they are now used for children, sports wearers, or anyone wanting greater impact resistance in their lenses. Polycarbonate lenses are the most popular material used in today's fashionable ophthalmic lenses. Polycarbonate lenses are ten times more impact resistant then the typical plastic lenses. Since Polycarbonate lenses are 35% thinner and lighter than the regular standard plastic lenses, they are also the most popular in all lenses materials offered today.

High Index Lens 1.67

Using a much higher index of refraction than plastic lenses or polycarbonate lenses, high prescriptions no longer mean thick ugly chunky lenses that can only be cut into fat heavy frames. Using material which is thinner and lighter, The High Index 1.67 lens was born. High Index Lenses stand way ahead of ordinary plastic lenses. The High Index 1.67 lens is made from polycarbonate material which is five times more impact resistant as well as up to sixty five percent thinner than standard plastic lenses.

The Advances in today's technology combine performing results for a thin and flat look. If you suffer from Farsightedness, the good news is that your eyes will magicaly appear less magnified & more natural in their size. Price has always been the turning point for the High Index 1.67 lense. If you have a high prescription you will no longer have to pay high prices from a local retail optician. Our prices are a fraction of todays retail lens price. If you want to change the way your lenses look from thick heavy to thin and light, these lenses will surely transform the way you look.

Hoya High Index Lens 1.70

Hoya High Index Lens are one of the most supreme lense materials, offering customers with higher prescriptions optimal visual lucidity in the lightest, thinnest and most dashing lenses available anywhere in the world. Combining the qualities of the High Index lenss and the 1.70 refractive index create incomparable Abbe Value of thirty six transforms. Hoya High Index Lens can be used for both your single vision, bifocal and progressive prescriptions. When the question is what are the best lenses on the market, Hoya recreates the meaning of the words "thin" and "light".

EYRY is a new patented and original high-index material that shatters new optical foundation with the world's 1st 1.70 refractive index utilizing an Abbe Value of 36. Hoya has taken on the challenge by combining the EVRY and introduced the 1.70,lens with a high index and unique characteristics. Literally half the thickness of regular plastic, 1.70 EYRY insures unyielding comfort to today's demanding customer. With a sensational Abbe value of 36 the 1.70, EYRY also renders the clarity of sight only offered by heavy lenses thick and bulky lenses.

The Hoya High Index 1.70 can be refined to a thin 1.0 millimeter center and has a 1.41 specific gravity. Hoya's ventures into unknown technologies of Tomorrow, allow the 1.70 EYRY lens customers the most balanced and natural optical experience on earth.

Hoya High Index Lenses come complete with Anti Reflective Coating, UV protection and scratch resistant coating.

High Index Lens 1.74

The Hi-Index 1.74 lens is the most flattest, thinnest , attractive and attention-getting lens ever formulated. The lens merits the best of every technologies and comes equiped with the most advanced anti-reflective coating treatment available. High Index Lens 1.74 lenses are 50% flatter than 1.50 index lenses and 13% flatter than 1.67 index, giving the customer the most amazing results by completely reducing the eye shrinking problem that many high prescriptions have. High index lenses utilize flatter curves than lower index comparison lenses to achieve a reduced lens profile.

Hi-index 1.74 lenses are great for the following reasons.

  • Users who are searching for extremely thin and flat lenses.
  • Customers who are interested in latest engineering technology of optical lenses.
  • Mid range to high range prescriptions looking for the best cosmetics.
  • Fashionable conscious individuals who care about the latest trends
  • Contact lens wearers
  • Sun-Sensative (Gray/Green or Brown Color)

    Sun-Sensative Lenses also known as Transition or Photochromic darken on the surface to as much as 70% tint in direct sunlight and lighten to 5% tint in shaded environments. These lenses are basically clear indoors and darken automatically when exposed to sunlight. The terminology 'photochromic' basically refers to this feature of the changing color "chroma" in response to light "photo". Photochromic lenses are designed to block 100% of sun's harmful (UV) ultraviolet rays.

    Photochromic lenses are usable for both non-prescription and prescription eyewear. Approximately 25% of prescription eyeglass today are photochromic lenses. The most common colors that are available for photochromic lenses are Brown and Gray. The typical lifespan of a photochromic lens is 36 months, at which time they will lose some of their ability to change in sunlight. Optomotrists recommend changing your lenses every 3 years.

    To annihilate glare from light reflecting from the back surface of Sun-Sensative lenses, (AR) anti-reflective coating can be applied, to both sides of the lens or to the backside only. Anti Reflective coating doesn't affect the photochromic process. When applying Anti Reflective coating to any sun sensative lens, the process will increase the light transmittance in indoor environments and outdoor environments. Typical Sun Sensative Lens are made of plastic material.

    Poly Sun-Sensative (Gray/Green or Brown Color)

    Polycarbonate Sun-Sensative Lenses also known as Transition or Photochromic darken on the surface to as much as 70% tint in direct sunlight and lighten to 5% tint in shaded environments. These lenses are basically clear indoors and darken automatically when exposed to sunlight. The difference between the standard Sunsensative Lense and the Polycarbonate sunsensative lense is that this one is made of the Polycarbonate material. This lense combined the technology in the Polycarbonate Lenses and adds the photochromic properties. The terminology 'photochromic' basically refers to this feature of the changing color "chroma" in response to light "photo". Photochromic lenses are designed to block 100% of sun's harmful (UV) ultraviolet rays.

    Photochromic lenses are usable for both non-prescription and prescription eyewear. Approximately 25% of prescription eyeglass today are photochromic lenses. The most common colors that are available for photochromic lenses are Brown and Gray. The typical lifespan of a photochromic lens is 36 months, at which time they will lose some of their ability to change in sunlight. Optomotrists recommend changing your lenses every 3 years.

    To annihilate glare from light reflecting from the back surface of Polycarbonate Sun-Sensative lenses, (AR) anti-reflective coating can be applied, to both sides of the lens or to the backside only. Anti Reflective coating doesn't affect the photochromic process. When applying Anti Reflective coating to any sun sensative lens, the process will increase the light transmittance in indoor environments and outdoor environments. Typical Sun Sensative Lens are made of plastic material.

    Polarized Lens

    Polarized lenses have been around for many years. The lenses are utilized in both eyeglasses and sunglasses to cut down glare from reflective surfaces such as the hood of a car or the reflection of a river. They execute this process through the process of polarization. Polarization is a process in which rays of light extend into different directions causing vibrations. Like window blinds Polarized Lenses control the flow and vibration of these rays only allowing some of them in.

    The earth's sunlight is not polarized itself. The light from the sun will be reflected horizontally, diagonally ,vertically or simply absorbed. The trouble this creates for drivers and fishermen sits in the horizontal reflectivity. The Sun light that bounces off any horizontal surface will smash the viewers eyes at a similar angle. This creates the glare that you see on the surface of the road, water or car hood.

    Polarized lenses are manufactured to contain a laminated surface of vertical stripes. These stripes Continuously allow vertically polarized light to enter the userís eyes. The end result glare is forever eliminated due to the horizontally polarized light waves that can't bypass the polarized filter. Polarized lenses can be fitted in any prescription eyeglasses or sunglasses. Polarized lenses can also be made to have no prescription giving the wearer a clear lens that exhibits the needed functionality.

    DriveWear Lens

    Drivewear lenses are the first photochromic lenses to darken behind the windshield of a car, allowing Drivewear to change color based on current driving conditions in order to enhance the driverís vision. In addition, Drivewear lenses are polarized to block blinding glare, another distinct advantage when driving a car. The only thing about Drivewear Lenses that most consumers don't know is that the lenses do not go completely clear indoors. The tint is about 50% the Overcast Color ( light green ) but the tint is light enough to see indoors. Transitions Lenses are clear indoors but the lenses do not active ( go darker ) behind a windshield where as Drivewear Lenses do.

    Transitions Xtractive Lens

    Anywhere you go, transitions xtractive lenses are uniquely designed to protect your eyes from the brightest sun and harsh artificial light. They work best to turn extra dark outdoors to protect from the brightest sun, even in the hottest conditions, darken behind the windshield of a car to protect the eyes from sunlight while driving.
     
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