http://eratostenes.info/index.php/ Articles at Eratostenes.info - Free Article Directory en-us http://eratostenes.info/index.php/health/vision/ordering-prescription-eyeglasses-online.html http://eratostenes.info/index.php/health/vision/ordering-prescription-eyeglasses-online.html Sat, 15 Aug 2009 20:11:22 -0700
1. Get your eyes checked, so you have a full, up-to-date prescription
2. Have your eye doctor or assistant give you your PD measurement
3. Get some measurements of your existing frame(s)
4. Find a frame online
5. Choose your lens
6. Order and wait for your glasses to arrive.

(1) It is recommended that you have your eyes checked every 1-2 years, for an up-to-date prescription. Make sure that after you have your exam, that you receive it from your doctor. Afterall, you have paid for this test and your prescription is rightfully yours.

(2) Ask your eye doctor or assistant to help you record your PD (or Pupillary Distance) measurement on your prescription. This is a simple measurement that they can take which is the distance between the centers of your pupils and is recorded in millimeters. Your eye doctor normally would use a machine that can automatically record the PD measurement while you look into a binocular-like device. The average adult's PD measurement is around 63mm while a child's measurement is around 54mm. If you get a separate measurement for your right and left eye, simply add them up to get your PD measurement. If you need to measure your own PD, place a ruler (in mm) on the bridge of your nose and get someone to help you measure the distance between the centers of your pupils with your eyes looking into the distance. It is also possible to measure the PD by yourself or even by taking a photo of yourself while holding a ruler below the bridge of your nose.

(3) Take some measurements of your existing frames, especially if you have a particular frame that you like. Oftentimes, you will notice that the measurements are stamped inside the temple or on the bridge. Usually, there are 3 measurements in such a form: 52 18-139. 52mm being the (eye size) Lens Width, 18mm being the (bridge size) Bridge Distance and 139mm being the Temple/Arm Length. Another important measurement is the lens height which you should take manually. Some people prefer shorter lens heights while others prefer larger lens heights. Progressive eyeglasses should have a minimum lens height of 26mm. When choosing a frame online make sure the measurements of the frames you are perusing are similar to the measurements you have taken of some of your existing frames. But remember, the measurements do not have to be exactly the same. It is only a good guideline, so you do not get frames that are grossly too large or too small for your head size. If you don't have any existing frames, or this is your first pair of eyeglasses, you may find a nice fitting pair or two at your local shop, and record the measurements down. Remember, the measurements should be stamped directly on the inside of the temples.

(4) Look for a frame to purchase online, and take into consideration what style you are looking for. Frames come in several styles including: full frame, rimless or semi-rimless. You may also be particular when it comes to the material of the frame which can range from steel/alloy, acetate/plastic, bamboo, wood or titanium.

(5) Input your prescription details onto the given form and choose the appropriate lens for your frames. If you don't understand your prescription, send and e-mail to your online vendor to see if they can decipher it for you. As a general rule if your sphere power is between +6.00 to -6.00 you can use the mid-index 1.56 lens. For sphere powers between +6.00 to -8.00, thin index 1.61 lens may be appropriate. For sphere powers between +8.00 and -12.00, high index 1.67 lens are recommended. Ultra high index 1.74 lens may be needed for more extreme sphere powers due to the thinness of the lens. Your lenses should include, anti-reflection coating, anti-glare, anti-scratch and UV coating. If you require additional lens surfacing, such as Photochromic lenses that darken when exposed to the sun's UV rays or need Polarization, you may ask your vendor if they offer this service.

(6) Order your glasses and use a credit card or payment service such as PayPal for a convenient transaction. Your glasses should arrive at your doorstep within 4 to 10 business days of your order being shipped. For some special prescriptions the lenses may take several days to process before being shipped out. In any event, it is always wise to be patient. Your order will arrive and you will be pleased at the amount of money you saved and what a great experience it is to order online.

Clearly Lenz offers an easy way to buy prescription eyeglasses online. We offer huge discounts on designer quality frames and prescription lens. Our highly qualified lab technicians have experience in handling the most challenging lens applications. Eyeglasses starting at $36 including single vision Rx lens, AR, anti-glare, UV and scratch resistant coating. Please visit: Clearly Lenz Shop ]]> http://eratostenes.info/index.php/health/vision/moist-contact-lenses-are-a-must.html http://eratostenes.info/index.php/health/vision/moist-contact-lenses-are-a-must.html Wed, 13 May 2009 20:00:05 -0700
Ciba Vision has just the solution with their recently released Air Optix line of contacts. Air Optix currently comes in three main lenses with more on the way. Air Optix Night & Day is the replacement lens for the formally Focus Night and Day. These lenses have been designed for wear constantly throughout the month with more moisture than previous monthly lenses.

The Air Optix Aqua has breathability like no other Ciba lens before it. Designed for daily wear, the Air Optix Aqua also fights deposit build-up. The last lens in this product line is the Air Optix for Astigmatism. Contact lenses for astigmatism have greatly improved over the last decade and the newest release by Ciba may top them all. Moist and comfortable, the lens is designed to decrease dryness, prevent blurriness from shifting, and provide more comfort at the end of the day.
]]> http://eratostenes.info/index.php/health/vision/contact-lens-industry-changes.html http://eratostenes.info/index.php/health/vision/contact-lens-industry-changes.html Tue, 31 Mar 2009 02:41:44 -0700
One new lens change is the Air Optix Night and Day. Formerly the Focus Night & Day, the Oasys Night & Day is virtually the same product with only the addition of an inverter marker and visibility tint. Fortunately for contact lens users, the Air Optix Night & Day can be purchased with the old Focus Night and Day prescription. Another recent change in the contact lens industry is the new Acuvue Oasys for Presbyopia. Presbyopia is the medical term for those who need bifocals. The Acuvue Oasys for Presbyopia has the same features and feel as the Acuvue Bifocal, which it should replace over the coming year.

Recent ratings in the March 2009 edition of Contact Lens Spectrum, named the Proclear Toric as the most popular toric contact lens on the market. This comes as surprising news as Acuvue, B&L, and Ciba Vision have popular toric lenses including Biomedics Toric, Purevision Toric, Acuvue Advance for Astigmatism and Air Optix for Astigmatism. The Proclear Toric received high marks in comfort and other factors by contact lens wearers in a study that lasted 5 months. The brand new Acuvue Oasys for Astigmatism was not included in the study so results may be different with the next research group.

All contact lens wearers should be aware of new products and ratings to help influence the type of lens your doctor may prescribe. ]]> http://eratostenes.info/index.php/health/vision/toric-contact-lenses-can-correct-astigmatism.html http://eratostenes.info/index.php/health/vision/toric-contact-lenses-can-correct-astigmatism.html Fri, 06 Mar 2009 23:49:02 -0800
"Astigmatism is an optical defect in which vision is blurred due to the inability of the optics of the eye to focus a point object into a sharp focused image on the retina." Toric contacts are specifically made to correct astigmatism through the use of different powers and different curvature angles.

All of the major contact lens manufacturer's have produced an astigmatic lens including Johnson & Johnson, Ciba Vision, and Bausch & Lomb. Each have their positive and negative points but through trial and error your eye doctor can easily find an astigmatic lens that works for you. Toric lenses come in all different styles including color, daily lenses, among numerous other options. Before you think you're stuck with eyeglasses, speak with your doctor to see if you can be fit for toric contact lenses for astigmatism. ]]>