Friday, January 24, 2020
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Lenses & Treatments

Anti-Reflective Lenses

One of the most common complaints we hear from eyeglass wearers is that their lenses produce glare and white reflections that interfere with clear vision. These reflections often cause eyestrain and headaches as wearers try to filter out the visual noise. If you want your lenses to disappear and feel like you’re wearing nothing at all, then the crystal-clear solution to glare problems is Anti-Reflective lenses.

Anti-Reflective lenses permit increased light transmission of 99.5% compared to 29% in untreated lenses. This increased transmission allows more light to reach your eyes instead of creating annoying reflections on the front and back surfaces of your lenses. With lens reflections reduced, eyes are able to relax, eliminating glare induced eyestrain and headaches. Anti-Reflective lenses are especially useful for decreasing computer monitor reflections and for eliminating headlight halos while driving at night. Clear lenses also make it easier for others to see your eyes, encouraging more effective communication and creating more flattering photos.

Many premium Anti-Reflective lenses have additional useful properties to help extend the life of your eyewear. We primarily use Crizal Anti-Reflective lenses, which offer scratch-resistance, ease of cleaning, static guard, and UVA and UVB protection. Anti-Reflective lenses are the clear choice for great eyewear!

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Progressive Lenses

Are you tired of carrying around two pairs of glasses that you have to change between if you want to look at your phone while watching TV? Do you want the convenience of a bifocal lens but worry that you will be mistaken for your grandmother because of the visible line? Then a Progressive Addition Lens (PAL) may be the solution for you. It combines the viewing flexibility of a trifocal’s design while removing the telltale lines. A seamless and gradual change in vision correction allows the wearer to shift focus from far away to up close viewing without the hassle of switching glasses.

Older versions of PALs often required an adaptation period while wearers adjusted to the focal zones. Lens design limited the wearer’s field of view, creating small “sweet spots” directly in front of the pupil while leaving most of the peripheral vision blurry. It was not uncommon for the wearer to have to hold her head in an unnatural position to see up close, often creating neck and back pain.

New advances in lens manufacturing technology have greatly improved the PAL experience. Lens designs are now offered in a variety of layouts which permit your optician to select the focal zone arrangement best suited to your lifestyle. Your optician can then further personalize your lenses by taking precise measurements that combine with prescription strength and frame size to maximize your visual field, minimize peripheral distortion, and encourage natural body posture. These lenses are comfortable to wear and patients often adapt immediately. Whether you spend your day in front of a computer, outdoors, or doing fine detail work, there is a PAL design for you.

Our office uses primarily Definity and Varilux progressive lenses from Essilor. These lenses are known for their innovative design which mimics natural eye tracking and body mechanics while delivering exceptional high-definition optics tailored to your lifestyle.

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HD Digital Lenses

Does your doctor insist that you have 20/20 vision when you wear your glasses but you still feel dissatisfied with how you see? If so, you might benefit from high-definition digital lenses.

Even if your prescription eyeglasses fully correct your nearsightedness, farsightedness, and/or astigmatism you may still experience distortions in your vision due to corneal defects called higher-order aberrations. These defects can affect color perception, low-light contrast sensitivity, and image resolution which results in less-than-perfect visual acuity.

For those suffering from higher-order aberrations, there is a solution. Recent advances in digital lens manufacturing have made possible new high-definition eyeglass lenses that correct these aberrations, potentially giving you sharper vision than you have ever had before with eyeglasses. These lenses are designed to provide better color perception, sharper vision in all lighting conditions, and higher image resolution.

With digital high-definition lenses, the fabrication of the lenses from the wearer's eyeglass prescription is optimized with computer-controlled surfacing equipment that is much more precise than conventional tools. In fact, digital technology can surface lenses in power increments of 0.01 diopter (D), compared with 0.125 to 0.25 D increments of conventional eyeglass lens tooling.

High-definition lenses are fully customized to your prescription, frame, and fitting measurements. Digital manufacturing requires more measurements from your optician to fabricate lenses capable of correcting higher-order aberrations. These measurements will often include pupil placement within the frame outline, frame size and shape, distance of pupil from lens, and the angle of the lens both vertically and horizontally in relation to your facial bones. These combined measurements create the most accurate lens power and the sharpest vision possible. High-definition digital manufacturing is available in most premium lens materials and styles, so a high-definition vision solution exists for you.

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High Index Lenses

Until recently, the only materials available for use as lenses were glass and a hard resin called CR-39. These materials were good, but they left much to be desired for patients with strong prescriptions which often make eyeglasses heavy. The solution was a new family of materials called high index. High index materials are named because they have a higher index of light refraction which creates greater optical clarity and reduces peripheral distortion. These characteristics make high index an especially good choice for eyeglass wearers with strong prescriptions or moderate to high astigmatism correction. High Index lenses are also thinner and lighter than their CR-39 and glass counterparts, making them more comfortable to wear and more cosmetically pleasing. Down with soda-bottle lenses!

When learning about high index lenses, you may hear many unfamiliar numbers and terms. Here are a few things to remember.


The most common alternative to CR39 and glass is polycarbonate. Polycarbonate was originally developed for fighter jet cockpits. It is very strong, very light, and resistant to scratches and breaking. These qualities make polycarbonate the best choice for children’s lenses as well as sport and safety glasses. Polycarbonate is a great choice for most light to moderate prescriptions, however better high index options that are thinner and provide better optical clarity exist for very high prescriptions.


Beyond polycarbonate, other high index materials are classified by numbers. The higher the number, the thinner and lighter the lens. The lower numbers are classified as mid-index lenses. Mid-index lenses, such as 1.54, 1.56, and 1.57 are thinner than glass, and nearly as strong as CR-39. These materials are most commonly used as a comparable alternative to polycarbonate if it is unable to be used due to prescription limitations.


High index lenses, such as 1.66, 1.67, and 1.74, are much thinner than regular glass or plastic. These materials provide the best optical clarity and create the thinnest lenses making them the natural choice for strong prescriptions. Some prescription and frame combinations will require the use of a high index material to insure quality and durability. Talk with your optician to decide which high index lens is right for you.

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Photochromic Lenses

If you have ever felt frustrated at needing both prescription glasses and prescription sunglasses to accommodate an outdoor lifestyle, you should consider photochromic lenses. Photochromic lenses darken when exposed to UV rays. The change occurs when photochromic molecules contained within the lens material are excited by UV rays. When the wearer goes outside , the lenses darken. When the wearer goes back inside, the lenses become clear.

Our office is pleased to offer Transitions brand photochromic lenses. Transitions lenses are available in a variety of styles designed to suit your lifestyle. Depending on which you choose, we can customize the lenses to your needs. Some lenses darken only in direct sunlight, while others darken in the shade. Some are designed to darken while you are in the car to reduce road glare while you are driving. You can even choose the color of the tint. Ask your optician which photochromic design would be best for you

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Polarized Lenses

Glare from wet roads, light reflecting off water, and the blinding sun reflecting off windows—all of these things can be annoying and dangerous. They can also be avoided with polarized sun lenses. These lenses filter out excess environmental glare, thereby reducing eye strain and increasing visibility.

Most glare comes from horizontal surfaces, so the light is “horizontally polarized.” Polarized lenses feature vertically-oriented “polarizers.” These polarizers block the horizontally-polarized light. The result is a glare-reduced view of the world. Polarized lenses can make a world of difference for any outdoor enthusiast. Fisherman can eliminate the bright reflections from the water and actually see into the water more easily than with other sunglasses, golfers can see the green easier, and joggers and bikers can enjoy reduced glare from the road. In addition, drivers can enjoy the safety and comfort that polarized lenses provide while driving.

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Bifocal Lenses

For many people, different lenses are needed for seeing at different distances. Bifocal lenses allow the wearer to look through two areas of the lens. One area focuses on distant objects. The other is used for reading.

Most of the time the “reading” area is smaller, shaped like a sideways “D”, and found in the lower hemisphere of the lens. These bifocals are called lined bifocals or flat-tops. If you are focusing on distant objects, you look through the top half of the lenses. To read a book, magazine, or newspaper, you look through the “reading” area. One thing that some people find challenging about using bifocals is dealing with the line between the two vision areas.

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Trifocal Lenses

Bifocals allow the wearer to read through one area of the lens, and to focus on distant objects through another area of the lens. As the eyes age, though, a stronger prescription is often needed to read. This would be fine, but the stronger prescription that allows for reading makes it difficult to focus on objects at intermediate distances, such as grocery items on a shelf or your speedometer. Thus, trifocals are necessary for a third prescription for intermediate focusing.

Trifocals, also known as lined trifocals, feature three areas of focusing power, each separated from the other by a distinct line. The three windows allow for focusing on distant objects, intermediately distanced objects, and for reading. A drawback of trifocals is that the lines are visibile, which some people may find distracting.

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Specialty Lenses

There are different lens designs available for just about anyone. No matter your particular need, there is probably a specialty lens available to improve your vision and comfort. Please inform your optician if your current eyewear is not living up to the rigors of your lifestyle so she can educate you about the many lens design solutions available.

One specialty lens that is commonly prescribed as a second pair is specifically designed for computer users. Computer lenses are not regular progressive lenses. Unlike regular progressive lenses that of provide equal viewing of far, intermediate, and near vision zones, computer lenses instead have increased intermediate and near areas to allow greater comfort while viewing your computer screen and desktop. The lenses are designed to reduce Computer Vision Syndrome, or CVS, which is characterized by headaches, eye strain, neck and back aches, dry eyes, blurred vision, and double vision. A pair of computer-specific eyeglasses which reduce eye strain are often a worthy investment for those who spend many hours in front of a computer.

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Scratch Resistance Treatment

Glass lenses of the past were inherently very hard and scratch-resistant. New materials like CR-39 and Hi-Index lenses are not as naturally scratch-resistant as glass, so to achieve the same durability they must undergo a special treatment for scratch-resistance. Scratches on lenses can interfere with clear vision, and can cosmetically look bad. Because scratches cannot be buffed out of lenses, once they occur there is no way to fix them.

Most of the Anti-Reflective lenses that we use in our office are already scratch-resistant treated. However if you do not opt for anti-reflective lenses, scratch-resistant treatment is a good alternative to preserve the longevity of your investment. One final note about scratch-resistance—it does not mean “scratch proof.” All lenses are susceptible to scratches if mishandled.

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Cosmetic and Specialty Tints

Eyeglasses do not only have to be functional; they can also be a stylish accessory.People often think that the frame is the only part of eyewear that can express personality, but there are also many ways to improve the appearance of the lenses through cosmetic tints. These tints offer a variety of colors and shades that span the rainbow and can be functional as well as fashionable. Some lenses are clear at the bottom and gradually get more colored towards the top of the lenses. There are many ways to customize your lenses to whatever style suits your personality.

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Office Details

Located in Downtown Chicago

328 S. Michigan Ave.
Chicago, IL 60604
Ph: (312) 427-6720
Fax: (312 ) 427-4010

  • Monday :9:00 am   to  6:00 pm
  • Tuesday :8:00 am  to  3:30 pm
  • Wednesday :9:00 am  to  6:00 pm
  • Thursday :8:00 am  to  3:30 pm
  • Friday :9:00 am  to  5:00 pm
  • Saturday :BY APPOINTMENT
  • Sunday :CLOSED

Pelini Eyecare | 328 S. Michigan Ave. | Chicago, IL 60604 | Phone: (312) 427-6720 | email us | site map
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