In some cases, a
cataract may be removed without implantingan artificial lens.
Before surgery, an eye
doctor ( ophthalmologist ) measures the size and shape of eye patient to
determine the proper power of the lens implant.
The measurements are
made with a painless ultrasound test. Cataract surgery is typically an
out patient procedure that takes less than anhour. Most people are awake and
need only local anesthesia. On rare occasions some people may need general
anesthesia.
Surgical methods used
to remove cataracts include :
- Phacoemulsification (fak-o-e-mul-sih-fih-KA-shun)
- During this procedure, surgeon removes the cataract but leaves most of the outer layer ( lens capsule ) in place.
The procedure during
phaco emulsification :
- Surgeon makes a small incision about 1 / 8 inch or 3 millimeters ( mm ) long where the cornea meets the conjunctiva and inserts an edle-thin probe.
- The surgeon then uses the probe, which transmits ultrasound waves, to break up ( emulsify ) the cataract and suction out the fragments.
- The lens capsule remains in place to provide support for the lens implant.
Extracapsular cataract
extraction
If your cataract has
advanced to the point where phacoemulsification can't break up the clouded lens,
surgeon may do an extracapsular cataract extraction.
The procedure during
extracapsular cataract extraction :
- Surgeon requires a larger incision, about 3 / 8 of an inch (10 mm ), where the cornea and sclera meet.
- Through this incision your surgeon opens the lens capsule, removes the nucleus in one piece and vacuums out the softer lens cortex,leaving the capsule in place.
- Once the cataract has been removed by either phacoemulsification or extracapsular extraction, a clear artificial lens isimplanted into the empty lens capsule. This implant, known as an intraocularlens ( IOL ), is made of plastic, acrylic or silicone. It requires no care andbecomes a permanent part of your eye.
- You'll likely need reading glasses after cataract surgery.
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