Home » Eyeglasses Lens » Something About Aspheric Lens For You
Something About Aspheric Lens For You
What is an aspheric lens and what is the difference between aspheric and spherical? Isn’t polycarbonate good enough? Or high index? Or Trivex? Many people ask these questions because they are confused about what an aspheric lens is and how it benefits patients.The word “aspheric” means “not spherical, an aspheric lens is not shaped like a ball. The basic difference between a spherical and an aspheric lens is that a spherical lens has one curvature and is shaped like a basketball. An aspheric lens curves gradually, like the football below.The contours of the front surface change from the center of the lens to the edges. Aspheric lenses are designed to guide light rays through the lens so that they all focus together on the retina, and this design results in flatter lenses. The aspheric design is available in CR-39, mid index 1.54, 1.56, 1.57 and polycarbonate (index 1.59). It is also available in high index 1.60, 1.66 and 1.70. A high index aspheric lens will provide the flattest, thinnest and lightest lens available with superior optics.
Aspheric designs are available in single vision lenses for the correction of nearsightedness, farsightedness and astigmatism, and in bifocals and progressive lenses for presbyopia. Both myopes and hyperopes can benefit from aspheric lenses, because they are thinner than regular lenses and provide better vision. Unlike conventional spherical lenses, aspheric lenses can refract light at large angles without introducing any significant spherical aberration. This allows a single asphere to perform the same function as a compound lens system. And perhaps the most powerful truism about asphericity is that vision through aspheric lenses is closer to natural vision.
Aspheric lenses are lighter, Improved optics, better visual acuity, minimal distortion, slimmer, flatter, thinner, making eyewear more comfortable. The most important of all the reasons to recommend aspheric lenses is the superior optics. The front curves of the aspheric lens are made so that the power remains consistent throughout the lens and as the eye moves away from the optical center, acuity remains sharp.
Comments (17)
I want to thank the blogger very much not only for this post but also for his all previous efforts. I found http://www.glassesvalue.com to be very interesting. I will be coming back to http://www.glassesvalue.com for more information.
eventhough I blow virtually all of my working day on the internet learning games like myspace poker or restaurant city, I nevertheless like to dedicate some free time to browse a small amount of blogs now and then and I am contented to report this latest content is in actual fact pretty good and really superior than half the various other waste I read today , anyhow i’m off to take up a couple of rounds of facebook poker
hey there really good little web page ya got here
I am using the same exact template on my own and yet for whatever silly reasons it would seem to load more rapidly on your site despite the fact that this site consists of significantly more content. Have you been getting different plug ins or widgets which speed it up? Do you think you could share the widgets so I could use them on my own webpage so twilight eclipse fans could watch twilight breaking dawn online trailers and clips easier I would be thankful – cheers in advance 
This is a superb post, but I was wondering how do I suscribe to the RSS feed?
This is a good posting, I was wondering if I could use this posting on my website, I will link it back to your website though. If this is a problem please let me know and I will take it down right away.
Your website looks really good. Being a blog writer myself, I really appreciate the time you took in writing this article.
Thank you for your blog post.Thanks Again. Much obliged.
You certainly have some agreeable opinions and views. Your blog provides a fresh look at the subject.
Very Interesting Post! Thank You For Thi Blog!
Very informative post. Thanks for taking the time to share your view with us.
Great Post. I add this Post to my bookmarks.
This is a outstanding post, but I was wondering how do I suscribe to the RSS feed?
howdy i submitted a question quite some time back with regards to how to speed up my twilight eclipse website’s loading time considering the fact that we used the very same theme back then and somebody placed a remark answering it on my website weeks ago – if that was you I just wanted to say cheers, and if it was not you then i am sorry to bother you, but thanks anyhow!
hey cool blog im thinking of making a blog on here as well.
This is a very good post, but I was wondering how do I suscribe to the RSS feed?
I love it!
This is a good blog, I was wondering if I could use this posting on my website, I will link it back to your website though. If this is a problem please let me know and I will take it down right away.