With free-form lenses, the creation of the lenses from the wearer’s eyeglass prescription is optimized with computer-controlled surfacing equipment that is much more precise than conventional milling tools. To show the degree of precision, free-form technology can surface lenses in power increments of 0.01 diopter (D), compared with 0.125 to 0.25 D increments with conventional eyeglass lens tooling.

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Outside of the basic shapes, other key differences between these lens types may factor into your decision of which lens type to choose.

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Spherical and aspherical lenses are two options of lens shapes. Spherical lenses are typically more bulky but also cheaper. Aspherical lenses have a slimmer design and can fit into more frames but might cost more. Talk to your eye doctor or optometrist about the best options for your prescription. Overnight Glasses has staff that can help you place the right order for your vision needs.

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Spherical lenses are traditional, curved lenses, while aspherical lenses offer similar vision correction with a less bulky profile. There are pros and cons to each of these lens types. This article will explore some of the differences between these lenses and when one style might be preferred over another.

Read what our patients are saying! ” I am very satisfied with my experience at The Eye Clinic today. The check-in was smooth and I did not have to wait at all. Valerie was professional, efficient and very nice. I’ve known Dr. Wilkins for years and I continue to trust his care and expertise. He is remarkable! “

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Gray or black is the most common tint for a sunglass lens. They provide enhanced optics and clear vision on sunny or cloudy days. Colors will look the truest through a gray-tinted lens. They provide the best color enhancement and protection against glare. If you’re looking for a lens tint you can use daily, select gray.

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Free-form lenses are the most popular type of high-definition eyeglass lenses. “Free-form” refers to the advanced manufacturing process that reduces higher-order aberrations such as spherical aberration that occur in traditional eyeglass lenses.

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Well, these lenses are designed to provide sharper vision in all lighting conditions, plus they reduce glare when driving at night. But they are more expensive, so here’s some information to help you get in the know about these new additions to the eyeglass world. Considering the beauty that surrounds us in Portland, seeing even better could certainly be worth it.

The production of spherical lenses can be done on a larger scale in batches. Aspherical lenses, however, are created one at a time using special machines. This special manufacturing process results in a more precise product but also raises the cost of aspherical lenses compared to spherical lenses.

You can’t really place the blame on conventional technology used to create the vast majority of eyeglass lenses and contacts. After all, the most recent innovation really was back in the 1980s with the introduction of plastic lenses. Things just haven’t changed that much in a very long time. Conventional lenses provide their optimum clarity through the optical center of the lens. As your eye looks away from the center, the clarity of your vision diminishes. This is more the case with high prescriptions and progressive lenses.

Although your eyeglasses correct your vision to 20/20, you may still wish your vision were even clearer in certain situations. You may have heard a glasses-wearing friend talking about “digital eyeglasses.” And now you wonder what they are, and should they be on your Christmas list?

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Recent advances in lens manufacturing techniques have made possible new high-definition eyeglass lenses that correct for higher-order aberrations. This allows sharper vision across the lens that has been available before. High-definition lenses are designed to provide sharper vision in all lighting conditions and reduce glare for nighttime driving and other night vision tasks.

In short, an aspheric lens is a lens that provides higher-quality imaging. They adjust curvature and shape to correct problems such as spherical aberration, ...

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Your prescription and the amount or specific type of vision correction you need will play a large role in the type of lens you choose. However, both spherical and aspherical lenses can meet the needs of most prescription strengths. You might make a personal choice between one lens or another based on the style and appearance you want, along with what price you can afford or what your vision insurance plan covers OvernightGlasses.com offers a variety of lens options for a complete pair of eyeglasses and automatically match your prescription with Aspheric lenses at no additional charge. When you select to use our lens replacement program or to order a complete new pair of glasses from Overnight Glasses, you can be certain that your lenses will be as thin and aesthetically looking as possible.

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All eyeglasses correct for the person’s predominant vision problem, be it nearsightedness, farsightedness, and/or astigmatism, but you could have other problems still affecting the clarity of your corrected vision. These are known as higher-order aberrations.

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So, are you interested in changing to high-definition lenses? Virtually anyone who wears eyeglasses is a good candidate for them. Those with higher eyeglass prescriptions are likely to notice a greater difference than those with mild prescriptions. Still, they do cost from 25-30 percent more.

” I am very satisfied with my experience at The Eye Clinic today. The check-in was smooth and I did not have to wait at all. Valerie was professional, efficient and very nice. I’ve known Dr. Wilkins for years and I continue to trust his care and expertise. He is remarkable! “

Traditionally, stronger prescriptions have required thicker lenses. Aspherical lenses allow you to have increased vision correction without added thickness. Both lenses can deliver a sharp focus for even strong prescriptions. The aspherical lens, however, has a somewhat superior performance with less bulk than spherical lenses.

Interested in these lenses? Ask us about them at The Eye Center. Fill out our contact form or call us at (503) 297-4718.

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Aspherical lenses have a slight curvature that is sometimes difficult to see with the naked eye. The curvature of these lenses is a more gradual curve than in spherical lenses and creates a more precise focus of light on the retina.

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Higher-order aberrations are more subtle, complex refractive errors, and the technology behind traditional eyeglasses and contact lenses may not be able to correct for them. These higher-order aberrations can cause difficulty seeing at night, glare, halos, blurring, starburst patterns, or even double vision. In each of us, our eyes have some degree of higher-order aberrations, but often they aren’t enough to cause issues with vision. Abnormal curvature of the cornea and crystalline lens may contribute to the distortion of many higher-order aberrations.

Spherical lenses are usually thicker because of their more rounded shape. This will give these lenses a “Coke bottle” type of appearance. Aspherical lenses are thinner, with a less obvious profile. This usually makes aspherical lenses more stylish or aesthetically pleasing, but you might not have a choice if you require a multifocal prescription such as progressive and no-line bifocals.

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Spherical lenses are the most common lens type and are often considered the standard lens type. These lenses are curved on at least one side. The curvature of the lens is crafted to focus light in a way that best enhances your vision. This is typically done with a convex (converging) or concave (diverging) lens curve. Your eye doctor will order a specific curvature based on your vision needs, and the lens maker will match the lens curvature to the prescription.