|
REFRACTIVE SURGERY :
To have a Refractive error in
eyes is a very common problem in our life. About 40% of the
total population wear Glasses or Contact lens. To have a
Refractive error is a natural thing. By using proper Glasses, we
can solve the problem of a Refractive error. But a person suffers
a lot because of Glasses. For e.g. The Glasses can create a
problem in sports, swimming, driving and many other routine works.
The Glasses might be a problem to get the job in several
professions like Navy, Airfroce, Police, Agriculture and some
other Industries. A very common and major problem with Glasses is
a cosmetic problem.
The promise of non-spectacle vision has been a dream for centuries.
Contact lens offered a solution to the cosmetic aspect but
placed the cornea at risk, if care guidelines were not strictly
adhered to. Many patients simply cannot tolerate contact lens
for medical reasons and many are not willing to perform the
daily maintenance required.
Our hospital is trying to
eliminate the need of glasses for people since years. In these
efforts the technique known as Redial Keratotomy (RK) was
the method of choice during 80's. But the technique remained always controversial. These days the most common corneal
refractive procedures are Photo Refractive Keratectomy (PRK)
and Laser in situ keratomilusis (LASIK).The most advanced
technique in LASIK is
C-LASIK which requires
wavefront Laser.
C-LASIK or
wavefront Laser is becoming
more and more popular world wide.
PRK:
In PRK, an Excimer laser is
used to ablate the surface of the cornea, flattening it as
appropriate of the individual patient. Here laser beam is directly
applied on the corneal surface and remove few microns of the
corneal tissue and change the corneal curvature PRK technique can
correct only minor Refractive errors.
LASIK :
Lasik or Laser in situ
Keratomileusis reshapes the cornea by using a laser beam, thereby
altering its curvature. Calculated change in the curvature
of the cornea corrects the vision. After this change the
image is focused at a right place on the retina and this makes
picture clear without glass.
The procedure is very short and
comfortable. Using an instrument called
Microkeratome a thin
flap of corneal tissue of 160 micron is raised. Laser is applied on
the corneal bed and the corneal flap is reposited back, where it
bonds without the need of stitches.
Excimer Laser is the machine by
which both these techniques are done. Our hospital is facilitated
with the NIDEK EC-5000 Eximer Laser as well as
the most advanced
wavefront Laser machine, NIDEK - NAVEX SYSTEM for
C-Lasik.
With this machine we can do the
refractive surgery with the great precision and safety. We can
explain in short how this machine works. Eximer Laser works by
removing some microns of the corneal tissue.
In
Myopia (short sightedness),
central corneal tissue is removed and by that curvature of the
cornea is reduced. In
Hypermetropia (far sightedness)
curvature of the central cornea is increased by removing mid
peripheral corneal tissue.
WHO CAN UNDERGO LASIK SURGERY :
If you fulfill the following
criteria, then don't wait, come forward and forget your glasses.
-
Age between 18 and 45 years.
-
Stable number for more than last 1
year.
-
Have healthy eye.
-
There should not be any sign of
ocular pathology like Keratoconus and systemic pathology like
collagen disease.
-
In pregnancy this surgery should be
avoided.
-
Patient's expectation and
understanding is important criteria before undergoing Lasik
surgery.
LIMITATIONS :
-
The machine can correct myopia up to
-14 D. and hyperopia up to +6 D. and astigmatism up to 6.0 to 7.0
D.
-
This is an irreversible technique.
-
Contrast sensitivity is not so good
as glasses and contact lenses (this problem is almost solved by
C-LASIK.
 |
Achievements
