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No matter how ready you are
for life without lenses, the decision to have LASIK
is a big one. You want to know for certain that
you are getting the safest, most trusted treatment
available. That is why our centre offers the most
advanced approach to LASIK including VISUMAX-LASIK
.
Refractive correction using LASER has seen tremendous
advancement since its first use in 1989. Different
types of laser refractive surgeries are:
Lasik: Laser Vision Correction
LASIK or Lasik (laser-assisted
in situ keratomileusis) is a type of refractive
surgery for correcting myopia, hyperopia, and astigmatism.in
which the reshaping of the cornea is done by using
excimer laser beam to alter its curvature. It corrects
vision by altering the refractive power of the eye
by producing a calculated change in the curvature
of the cornea. The procedure is relatively simple
and comfortable. Eyes of the patient are made numb
by instilling anesthetic eye drops. Using an instrument
called microkeratome a thin flap of corneal tissue
is raised. The excimer Laser then ablates the cornea
by removing a predetermined precise amount of tissue
from inner cornea. The corneal flap is then repositioned
back where it bonds without the need of stitches.
There have always been concerns about LASIK because
of its tendency to induce higher-order aberrations.
Higher-order aberrations are visual problems that
cannot be diagnosed using a traditional eye exam,
which tests only for acuteness of vision. Severe
aberrations can cause significant vision impairment.
These aberrations include starbursts, ghosting,
halos, double vision, and a number of other post-operative
complications.
The advancement of the LASIK technology
has helped reduce the risk of clinically significant
visual impairment after surgery. Wavefront-guided
LASIK is a variation of LASIK surgery in which,
rather than applying a simple correction of focusing
power to the cornea (as in traditional LASIK), a
spatially varying correction, guiding the computer-controlled
excimer laser with measurements from a wavefront
sensor is done. The goal is to achieve a more optically
perfect eye, though the final result still depends
on the physician's success at predicting changes
that occur during healing.
Blade free Lasik
One
of the advancement in Lasik is the state of the
art femtosecond laser. The use of blade to cut the
corneal flap is replaced by all Laser option, where
the flap is created using the femto laser. This
is the same revolutionary technology that is used
by NASA and the US AIR FORCE to rectify Refractive
errors of its astronauts and fighter pilots.
Intralase
is a particular type of femtosecond laser which
was first to be used for Blade Free Surgery. The
more advanced femtosecond laser, from Carl Zeiss
Meditec, called the VisuMax is now available in
market. The VisuMax is a fifth generation femtosecond
laser, which has several advantages over the Intralase
for Blade Free LASIK. We feel proud to be equipped
with this latest technology for delivering the best
services to our patients and feel immense pride
in saying that we brought this facility even before
it was available to patients in big metros like
Delhi, Mumbai, and Chennai.
The VisuMax uses a much
lower pulse energy (100 nJ compared with 800 nJ)
than the Intralase, and a much higher frequency
(500 KHz as opposed to 60 KHz). This results in
much less inflammation of the eye post LASIK, and
a faster and easier procedure. The VisuMax also
used a curved contact glass on the cornea, as opposed
to the Intralase, which uses a high scleral suction.
The patient experiences a blackout during the Intralase
procedure, which does not happen with the VisuMax.
Many patients get a red spots in the white of the
eye after Intralase-this never happens with the
VisuMax. Finally, and most importantly, the amount
of gas bubbles produced with the Intralase is much
higher than with the VisuMax. This leads to an inaccuracy
of the flap thickness, and does not allow a very
thin flap to be produced with the Intralase. This
has significant effects on the safety of the procedure.
The procedure is carried out as follows:
Step 1.
Blueprint made of your eye
In order to deliver the
exact correction you need, Iris Registration and WaveScan 3D Mapping creates a blueprint (or fingerprint)
of your eye. This allows our surgeons to custom-fit
the LASIK procedure. This step involves mapping
the individual curvature of your cornea, to the
microscopic nuances of your anatomy, allowing us
to deliver the exact correction required.
Step 2.
Corneal Flap & Vision Correction
a. An ultra-fast
laser creates a thin corneal flap, which is then
folded back. The process is...
- Ultra–fast pulses
of laser light position microscopic bubbles at a
precise depth determined by your doctor.
- The laser
light passes harmlessly through your cornea, and
then creates rows of bubbles just beneath your corneal
surface as it moves back and forth across your eye
in a uniform plane.
- Next, the laser stacks bubbles
around your corneal diameter to create the edges
of your flap. These bubbles are stacked at an angle
that is determined by your doctor and is individualized
to the way your eye is shaped.
- The process takes
only about 15sec from start to finish— it’s quiet
and comfortable.
- Your doctor then gently lifts
the flap to allow for the second step of your LASIK
treatment. When treatment is complete, the flap
easily “locks” back into position and rapidly begins
to heal.
b. A second laser corrects your vision,
based on your eyes exact measurements and specifications.
You can expect this procedure to be a quick, virtually
painless experience with immediate results.
Step
3. Post Operative Checks
Final post op checks take
place, and then you are free to carry on with your
normal active lifestyle, potentially with 20/20
or better vision.
We are a pioneer in the field
of LASIK surgery in Rajasthan and have always tried
to meet the increasing demands and expectations
of patients by keeping our centre updated with the
latest technology and we take immense pride in introducing
this very innovative technology to not only Rajasthan
but also to the north India the VISUMAX
EpiLasik
Certain individuals with thin corneas are turned
back for lasik surgery; they can be treated with
epilasik. This new generation vision correction
surgery uses a blunt blade to cleave or push away
a thinner corneal flap to leave behind more residual
corneal thickness that gives more strength and stability
of the cornea. It is A device similar to a microkeratome
(called epi-keratome) slides over the surface of
the cornea, just underneath the epithelial layer
of cells while suction is applied. The result is
a hinged sheet of epithelium that is at least partially
viable. It is reflected out of the way so that the
ablation can take place. The sheet is repositioned
and a bandage soft contact lens is placed on the
eye.
It is a better treatment for eyes having high
power and/or thin corneas. It causes less damage
to corneal nerves, therefore a better option in
dry eye problems.
PHAKIC Intraocular lenses
Phakic
IOLs (intraocular lenses) are surgically implanted
lenses as an alternative to LASIK in unfit eyes
due to thin cornea or very high refractive power.
They are specialized lenses made of plastic or silicone
material, which are implanted into the eye permanently
to reduce a person's dependence on glasses or contact
lenses. They are called as Phakic lenses as they
are implanted into the eye without removing the
eye's natural lens. The phakic lens is inserted
through a small incision and placed just in front
of or just behind the iris.
LASER blended vision:
Recently a treatment called blended vision has been
developed. It is used to treat presbyopia, a condition
that occurs due to the ageing of your eye, which
causes problems when looking at objects that are
close to you. By treating one eye to look at images
up close and leaving the other, you will be able
to see properly again after a short period of adjustment.
Laser blended vision or monovision is a LASIK based
procedure, whereby the surgeon corrects each eye
for a different type of vision.
Laser Blended Vision
adjusts each eye in different ways. One eye is adjusted
to see mostly at distance and a little close up,
while the other is the opposite: mostly up close
and a little at distance. In most cases, the brain
compensates for this quickly. It combines the two
images to give much greater depth of vision, and
an all-round improvement in visual acuity that means
most patients can throw away those infuriating reading
glasses.
Laser Blended Vision is much more effective,
and easier to adapt to, than the traditional solution
of monovision. Monovision uses contact lenses (or
older laser systems) to make one eye focused on
near and one eye focused on distance. This is a
far less sophisticated solution, suitable for only
around 50% of patients. In comparison, studies have
also shown that Laser Blended Vision is appropriate
for 97% of people. So, while we may not be able
to stop the ageing process in its tracks, we can
make it much more comfortable and convenient for
almost everyone.
Conductive keratoplasty (CK)
CK
is a non-laser refractive eye surgery designed to
correct mild hyperopia and help people who are middle-aged
and older reduce their need for reading glasses
after they become presbyopic.
If you have clear
distance vision and your only problem is poor near
vision due to presbyopia, conductive keratoplasty
is performed on only one eye. This creates a mild
form of monovision, meaning that one eye is corrected
for near vision while the other eye is stronger
for distance vision.
Unlike LASIK, PRK and other
laser-based procedures, NearVision CK uses low energy
radio waves to reshape the cornea and restore near
vision.
During the CK procedure, your eye surgeon
uses a hand-held instrument with a tiny probe (smaller
than a human hair) to apply low-level, radio frequency
(RF) energy to specific spots that form a circular
pattern on the outer part of the cornea.
Connective
tissue then shrinks where the RF energy was applied,
causing the circular band to act like a belt that
"tightens" and steepens the cornea. This change
in the curvature of the eye's surface affects the
way light rays enter the eye to bring near vision
back into focus.
Refractive surgery services:
Refractive
surgery is most commonly performed laser surgery
and it has immensely evolved with increasing demands
of patients and doctors for perfection. We are truly
the only centre in Rajasthan that has walked step
by step with the growing technology in this field
and we cater almost all of the options available
for removal of glasses i.e.
- Traditional microkeratome-assisted
LASIK
-
CustomVue LASIK or wavefront guided LASIK:
tailor-made to correct the individual aberrations
of each eye
-
Blade-free LASIK: the cutting edge technology
of VISUMAX
-
Epi-LASIK: an option for cases with thin
corneas.
-
Phakic Intraocular Lenses.
-
Accommodative
and multifocal IOL after cataract surgery.
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