Welcome to Eye Surgery Guide
Laser Eye Surgery Baltimore Article
Photorefractive Keratectomy Laser Eye Surgery
Nicola Kennedy
Photorefractive keratectomy (PRK) is a laser eye surgery
procedure that is carried out with the key intent to correct a
patient's vision. PRK permanently changes the shape of the
frontal corneal tissue using an excimer laser, which is a
high-precision ultraviolet chemical laser. The outer layer of
the cornea (epithelium) is removed, and then a small amount of
the corneal tissue is burnt off using the laser. Such an
ablation renders the desired shape to the cornea and allows for
optimal refraction.
PRK is a technologically advanced surgical procedure. For
instance, a computer system tracks the eye position around 4,000
times per second, redirecting laser pulses for precise ablation.
As mentioned above, the epithelium is removed prior to ablation.
This does not hamper the patient's vision, since the epithelium
is a soft and regenerating layer, which is capable of completely
replacing itself within a matter of days. However, the deeper
layers, once burnt off, will remain that way because they
possess limited regenerative capability. This theory is the
cornerstone of the Photorefractive keratectomy surgical
procedure.
PRK differs from LASIK in a way that the epithelium is removed
in PRK and allowed to regenerate. On the other hand, LASIK does
not involve epithelium removal. Instead it consists of cutting a
flap in the cornea in order to make the desired incisions.
Compared to LASIK, a patient who has undergone PRK experiences
more pain and recovery is slow. However, both procedures are
similar in the respect that they make use of a laser.
Photorefractive keratectomy is a viable procedure, but it does
have possible complications. Apart from slow recovery and pain,
the patient may experience glares and halos. As in any
refractive surgery, there is a possibility of over- or
under-correction. Eye surgeons typically perform PRK on one eye
at a time, in order to gauge the results of the procedure and
ensure its efficacy.
In a majority of cases, PRK has proven to be a safe and
efficacious procedure to correct myopia. However, since the
procedure is irreversible, it is recommended that the patient
consults an eye doctor instead of jumping on a conclusion.
About the author:
You will find the Directory of LASIK
Surgeons useful. Nicola Kennedy publishes articles and
reports and provides news, views and information about alternatives to LASIK eye
surgery at Your Lasik Information.
Copyright http://www.Your-LASIK.info This article may be
reprinted in full so long as the resource box and live links
remain intact.
Laser Eye Surgery Baltimore Best products
Laser Eye Surgery Baltimore News
Mother Earth Mother Board - Wired
In which the hacker tourist ventures forth across the wide and wondrous meatspace of three continents, acquainting himself with the customs and dialects of the exotic Manhole Villagers of Thailand, the U-Turn Tunnelers of the Nile Delta, the Cable ...
Read more...A high-tech look at the art of Matisse - Baltimore Sun
A mechanical engineer by training, Jeff Mechlinksi used to spend his days poring over 3-D images of helicopter parts and other industrial gizmos on the glowing screen of his high-tech computer work station. Then the Matisses showed up. Turbocharged ...
Read more...No quit in cheaters thanks to continuous medical advances - Baltimore Sun
The Mitchell Report and other sources have suggested that athletes turn to banned drugs as much to bounce back from injuries as to build strength. So it's not hard to imagine the appeal of Huard's methods. Given that the patient would receive an ...
Read more...The Daily Dose - Sporting News
I am not one who usually attempts to defy change. In fact, my business is currently going through a reconstructive era . . . aka change. My personal life has witnessed some changes as things are finally starting to come together in a more positive ...
Read more...The mysteries of sleep - Tribune
Why do we sleep? More than 80 years after the world's first sleep laboratory opened in Los Angeles, and in spite of intensive investigations of the sleeping brain, we still do not know the answer. Sleeping and dreaming remain among the greatest ...
Read more...