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Cataract Surgery & Eyeglasses

  • Post at: July 14, 2008
  • By: dodo
  • Category: Cataract, Phacoemulsification

The first step in restoring vision is to remove the cloudy lens surgically. This is one of the safest, most successful, and widely performed operations. Of the 400,000 to 600,000 cases performed annually in this country, over 90 percent succeed in helping to restore vision, thanks to improvements in surgical techniques and in the skills of ophthalmic surgeons.

The surgeon has a choice of several surgical approaches; the decision is based upon the type and stage of the cataract, as well as the age of the patient. The lens may be extracted by freezing the lens with a tiny metal probe that adheres to the cataract and removes it intact (cryoextraction). A relatively new method, ultrasonic phacoemulsification, employs a tiny titanium needle vibrating at forty thousand times per second that emulsifies the cataract, which is then aspirated through the same needle. The cataract incision may require several tiny sutures (in the cryoextraction technique) or only a single suture in the ultrasonic technique. The resulting postoperative condition of an eye without a lens is called aphakia; a person with aphakia is called an aphake. Aphakes are not blind as a result of surgery, but, because the normal refracting lens is gone, their vision is impaired (similar to what a normal person sees under water).

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Cataract Eyeglasses

The next step in restoring sight is to provide a refracting lens to replace the normal crystalline lens which has been surgically removed. The traditional solution has been cataract eyeglasses. But these are heavy, and have thick “sunny-side-up” or “oyster” lenses that enlarge the visual image by 30 percent. Through these glasses the world looks strange and distorted. Peripheral vision is severely limited; the sensation is one of looking through a tunnel. Wearers often find that at first they spill things, or have trouble keeping their balance. Objects, such as doors, curve precipitously away or loom suddenly into view. The problem is compounded when only one eye has been operated on, and the patient has monocular aphakia. In this case only one eye receives the cataract eyeglass. It is almost impossible to correct monocular aphakia satisfactorily with glasses because the eyes can’t work together: the images are of vastly different sizes, resulting in a lack of fusion or binocularity. This problem lasts until the other cataract is removed and that eye receives its own corrective spectacle. Consequently this solution is very rare these days. The main advantage of cataract glasses is the ease with which they can be put on and removed, and that they are a familiar, unthreatening device.

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5 Responses to “Cataract Surgery & Eyeglasses”

  1. Sun Glasses Says:
    July 14th, 2008 at 1:28 am

    If collection, you will be liable for costs of collection including attorney's fees, court costs, and collection agency fees. … Sun Glasses

  2. Receive Free Lens Scratch Coating Says:
    July 14th, 2008 at 1:29 am

    Due to the reduction of reflected light, polarized lenses are great for use on the water, water or snow, and for sporting events. … Receive Free Lens Scratch Coating

  3. Health Care Professional Says:
    July 14th, 2008 at 1:31 am

    When the cataract starts negatively affect visual clarity, it is still relatively soft, and thus does not require much ultrasound power to dissolve it. … Health Care Professional

  4. Cataracts Observed Says:
    July 14th, 2008 at 1:33 am

    Those in the group with the highest lead levels were almost three times as likely as those in the bottom group to have developed cataracts over the eight years covered in the study. … Cataracts Observed

  5. National Eye Institute Says:
    July 14th, 2008 at 1:51 am

    Best the fact compromised practice the patients are only meeting their surgeon immediately before a procedure at which point generally they are committed to and have paid for the surgery. … National Eye Institute

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