Dr. Sudip Chaudhuri (MD–AIIMS, NEW DELHI) started performing Lasik surgery from 1998. Trained in lasik from Delhi,and refined by Dr Michael Knorz from Germany, He has performed over 15,000 lasik surgeries over the last 25 years.
Has a rich experience of using different lasik machines and microkeratomes over the last 25 years. Currently using Wavelight ex 500 , VIS X , Moria Microkeratome and Femtosecond laser.
The art of lasik that has been mastered today was dreamt long ago and performed by people who have dared. The Excimer laser invented by a team of scientists led by Dr. Mani Bhaumik was put into use to achieve this miracle. The constant effort for refinement and perfection , the hard work of many scientists , technicians and doctors has made it possible to perform the procedure with extreme safety and accuracy. I have an experience of performing over 15000 eyes from 1998 in Delhi (here I learnt LASIK ) , Kolkata,Guahati and Aizawl ( the only lasik centre in Mizoram as of now ). I have used various machines like technolas 117 ,217, z-100 ,nidek . Presently using wavelight ex-500 and vis-x. Among the microkeratomes-hansatome.XP , moria one use plus deserves special mention. Have come across almost all possible complications in lasik. Starting from infections,machine oil leakage,DLK, accidental thick flap (detected in postop OCT) . free flap and half flap etc.Properly managed, sight threatening complication is rare after lasik.
Lasik is the safest and most accurate procedure to reduce eye power and aberrations.
Depending on CORNEAL thickness and corneal curvature parameters, power can be removed ranging from -1 to -11D and +1 to -+6 D. Astigmatism/Cylindrical power of about 5-6 D can be corrected.
The first step is flap making. It can be done in 2 ways :
1. Mechanical flap cutter called microkeratome about 12 second procedure .
2. Femtosecond laser procedure about 30-40 second procedure .
The second step is corneal shaping . The laser shaping is done under direct tracking system so as to deliver the laser with extreme precision on the cornea.
This extreme precision may not be achieved with any other refractive surgery procedure.
Various shaping nomogram like wavefront optimized,wavefront guided and topography guided(contoura) are available. These advanced nomograms can reduce aberrations.Reduction in aberrations improve the quality of vision in dim light, by reducing glares and halos.
Present generation laser machines can correct POWER and reduce ABERRATIONS.
POWER When corrected one see better , can see upto the last lines of the vision chart depending on the capacity of the nerve behind.
ABERRATION when reduced helps you to have a better quality of vision at night/dim light condition by reducing halos and glare.it is because of various aberrations inside the eye that the light spreads out in different directions when you see a bright light source in dark/dim light.it sometimes appear to be a halo around the light source or spreading out from a point which one describes as glare or starburst.Particularly people who drive may complain more.
Aberration happens because the shutter inside the eye- the pupil dilates in dark.that allows light to enter through a larger area .
ABERROMETER is an instrument to measure the aberrations.There are several types of aberrations.coma,trefoil,spherical,tetrafoil etc.
Preoperative aberration measurement can give a fair idea of the disturbing aberrations
A standard lasik procedure corrects the power only but may induce new aberrations beyond the preexisting ones which can give rise to glares and halos which were not there before.
A Q-Lasik technique / Wavefront optimized technique tries to keep the q value(asphericity index) in normal/ desired range so that the spherical aberration does not change significantly.However coma, trefoil and other aberrations may not be improved/reduced
A C-Lasik (Customized )/ Topo guided techniques requires a preoperative aberration measurement .The data is analyzed and required custom treatments done to correct / reduces all aberrations significantly.However it Is not possible to eliminate all aberrations completely. But a significantly improved quality of night vision can be achieved.
Presently with tracking systems and various nomograms available the corneal reshaping is extremely precise and predictable.
VIS X – A time tested machine with a very high efficiency to do customized treatment high definition lasik
WAVELIGHT 500 - An extremely fast and accurate machine to do standard and wavefront optimized treatments.
Results : Extremely satisfying . However in very high powers in excess of 5/6 D ,a little rollback may happen. Sometimes a small power needs spectacle correction.
OVERALL VERY SAFE AND ACCURATE WITH QUICK RECOVERY. A LITTLE DRYNESS CAN HAPPEN , WHICH REQUIRES TEAR SUBSTITUTES TO BE USED FOR FEW MONTHS.
An accurate refraction matched with pentacam/oculyzer data and aberrometry data.
(Pentacam/oculyzer)- To rule out keratoconus and its subclinical forms, and gives an idea of maximum power removal possible in that particular eye.(It depends on the residual corneal thickness and the expected changed keratometry value limits-33/34D-49 D).
To assess the types of higher order aberrations.
To rule out lens subluxation and to check the retina for peripheral treatable lesions.
∗Note : GENERAL HEALTH CONDITION like presence of diabetes is also important. Schirmers test to rule out dry eye.
Mob: +91 9830775892
Email: chaudhurinimo@gmail.com
Website: http://www.lasikkolkata.com/
