Laser Surgery: Using the Right Medical Instruments

When light is not correctively focused precesily on the eye as it should be than laser surgery will be the only way the naked eye can see properly. Surgeons using there own specialize medical instruments can solve this problem by reshaping the curve of your eye using a laser.

For top results the surgeon will operate on one eye at a time. The surgeon will clean the lid and the lashes and then administers antiseptic drops to freeze the eye and lid. He will then try to open the eye lid with a speculum. Then the surgeon will wash your eye with a saline solution from one of his many surgical instrument sets. Your whole eye area is frozen so the patient doesn't feel a thing.

Next are anti-biotitic drops which prevent infection. The surgeon will test his laser equipment before every operation. He shoots the laser on a metal plate to test its energy level. The surgeon will then inspect the micro-carotene after he adds more drops. The device is used to lift a very thin layer from the outer surface of the eye. Your cornea is measured by the doctor using his surgical equipment. He will then pry open the eye lid using the speculum then begins the operation. Using sterile ink the surgeon will make a point of reference on the the eyeball. It's a reference to mark to be used later.

Next a metal ring is arranged around the cornea. This is able to happen because the ring is attached to a sunction pump which grips the eyeball lightly. This same approach can be seen when you clutch a tomato when you cut it. It holds the eyeball steady while the surgeon cuts the tissue. After the surgeon has lubricated your eye he will then mop up the water with an absorbent sponge. Then the micro-carotene is slipped into the grooves in the metal suction ring. Within a matter of seconds the device moves across the eye cutting open a thin piece of eye tissue. Doing this looks like how a carpenters blade shaves a layer of wood.

To keep tears from infecting the cornea the surgeon will use a sterile sponge to keep tears from infecting the cornea. After this he will fold back a piece of tissue exposing the cornea. He will then soak up an extra liquid, and finally fires up the laser. Meanwhile the tiny sponge keeps the piece of thin tissue moist. The laser fires 50 pulses/second and is an invisible beam of light. Each pulse vaporizes a one-quarter microbe of cornea eye tissue. The laser is controlled by a computer program so it knows exactly how to curve the cornea to give most patients 20/20 vision.

In less than a minute the laser has done its job. The surgeon removes the sponge and then using the ink marks he used earlier as a reference folds the flap of tissue back to its original position. If the flap doesn't go back exactly where it was before then the patient will have distorted vision. With a syringe that flushes the area with sterile water the surgeon carefully iron out the flap. After about 45 seconds the negative pressure inside the cornea vacuums the flap back on. The flap literally seals itself. To verify that everything is alright. Anti-biotitic drops are applied as a protective measure and then the surgeon will then move onto the next eye.

When its all finished the surgeon uses a powerful microscope to make sure the thin eye tissue is wrinkle free. Finally the patient wears protective covers overnight for just a week.

... And that's how you do laser eye surgery.



A "medical instruments" article is by Keith R.

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