Are you fed up of your Are you fed up of your glasses or contact glasses or contact

lenses?lenses?Now WE have Now WE have a permanent solutiona permanent solution for U! for U!

Dr.Madhuri Dixit Dr.Madhuri Dixit M.S.(Ophthal)M.S.(Ophthal)

Director & Consultant Eye SurgeonDirector & Consultant Eye Surgeon

KLES KLES BELGAUM LASIK LASER CENTREBELGAUM LASIK LASER CENTRE

WHAT IS LASIKWHAT IS LASIK ??

LASER ASSISTED IN LASER ASSISTED IN SITU STROMAL SITU STROMAL

KERATOMILIEOSISKERATOMILIEOSIS

BEST OF OLD AND NEWBEST OF OLD AND NEW

OLD OLD ALKALK

AUTOMATED LAMMELER AUTOMATED LAMMELER KERATECTOMYKERATECTOMY

NEW NEW PRKPRK

PHOTOREFRACIVE PHOTOREFRACIVE KERATECTOMYKERATECTOMY

ALK stands for “Automated Lamellar Keratomileusis”. This procedure has been performed for over 40 years. This is very similar to LASIK. A corneal flap was created with the same type of device.

Tissue was then removed by another pass of the same device, removing a pre-calculated thickness button of tissue and then the flap was replaced. The problem with this procedure was in the accuracy and predictability.

PRK or Photo Refractive Keratectomy has been performed for 10 years. This procedure involved using an excimer laser through all the layers of the cornea

Although it was very accurate it did not heal rapidly because the top layer of epithelium required up to 3 days to heal. Stability has been shown with this procedure for 10 years with no loss of effect

LASER procedures much more accurate

THREE THREE IMPORTANTIMPORTANT STEPS STEPS

CREATION OF CORNEAL FLAPCREATION OF CORNEAL FLAP

EXCIMER LASER ABLATIONEXCIMER LASER ABLATION

REPOSITIONING OF CORNEAL FLAPREPOSITIONING OF CORNEAL FLAP

MICROKERATOMEMICROKERATOME

ALLEGRETTO WAVE ALLEGRETTO WAVE

SAFESTSAFEST

FASTESTFASTEST

PRECISEPRECISE

About ALLEGRETO.About ALLEGRETO.wavewave..

GERMAN makeGERMAN makeWavelightWavelight

FDA approved.FDA approved.ISO certified.ISO certified.Wave front Wave front

optimisedoptimisedFast, safe andFast, safe and

precise.precise.Can correct Can correct

Up to Up to 14 14 DD

(WFO) Wavefront Optimised (WFO) Wavefront Optimised TreatmentTreatment

It is achieved by giving It is achieved by giving more energy per pulse at more energy per pulse at the periphery of the the periphery of the treatment as compared to treatment as compared to that given in the central that given in the central zone. zone.

Thus it produces equal Thus it produces equal ablation of both central ablation of both central and peripheral cornea and peripheral cornea

Divyadrishti Lasers, Satara.

With standard

LASIKWith WFO

LASIK

Importance of very small Importance of very small Flying Flying SpotSpot Laser Laser

Smaller the spot Smaller the spot (<1mm), more precise is (<1mm), more precise is the Laser delivery leading the Laser delivery leading to more precise change in to more precise change in laser ablation of cornealaser ablation of cornea

Small ablation spot(Cross section of an ablation)

0.95 mmdiameter

0.45 µmdepth

Cornea(top view)

2 mmSpots

1 mmSpotsOptical zone

6.5 mm

Comparison large / small spots

11 mmDiameter

ABLATION

Active Eye TrackerActive Eye Tracker

A very fast repetition rate of A very fast repetition rate of Active Eye Tracker system Active Eye Tracker system minimizes and eliminates the minimizes and eliminates the millisecond lag between millisecond lag between tracking laser beam and the tracking laser beam and the movement of the eyeballmovement of the eyeball

It leads to It leads to precisely centered precisely centered laser treatmentlaser treatment

Myopic 3D ablation profile

24

68

10

2

4

6

8

10

-200

-150

-100

-50

0

50

100

150

200

Z A

xis

[µm

]

Y A

xis

[mm

]

X Axis [mm]

ABLATION

Hyperopic 3D ablation profile

24

68

10

2

4

6

8

10

-200

-150

-100

-50

0

50

100

150

200

Z A

xis

[µ

m]

Y A

xis

[mm

]

X Axis [mm]

ABLATION

Comparative Study of LASIK Comparative Study of LASIK technologiestechnologies

What exactly is LASIK??What exactly is LASIK??

POST PROCEDURE CAREPOST PROCEDURE CARE

EYE PROTECTIONEYE PROTECTION

EYE DROPSEYE DROPS

REGULAR FOLLOW UPREGULAR FOLLOW UP

Study of 200 eyes of Study of 200 eyes of WFO LASIK Laser TreatmentWFO LASIK Laser Treatment

Operated by Two Surgeons.Operated by Two Surgeons.

Laser delivery system was Laser delivery system was samesame

Cases were followed for Cases were followed for minimum period of 6 monthsminimum period of 6 months

Male : Female 39 62Male : Female 39 62

Age distribution:Age distribution:

Age (in Yrs)Age (in Yrs) No. of eyesNo. of eyes

19-2519-25 5858

25-3525-35 2929

36-4036-40 1010

above 40above 40 44

WFO TreatmentWFO Treatment

myopia 22myopia 22

myopic astigmatism 162myopic astigmatism 162

hypermetropia 10 hypermetropia 10

KLES BELGAUM KLES BELGAUM LASIK LASIK LASER LASER CENTRECENTRE

WORLD WITHOUT GLASSESWORLD WITHOUT GLASSES

THANK U !THANK U !