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Refractive Surgery Lasik
 

L - Light
A – Amplification by
S – Stimulated
E – Emission of
R – Radiation

L – Laser
AS – Assisted
I – Insitu
K – Keratomilieusis

ADVANTAGES

• Procedure is done on an outpatient basis
• Both eyes treated on the same day
• Clarity of vision within hours of surgery
• requires less time for full recovery
• patient experiences no pain.

Laser used for removing eye numbers is known as an Excimer laser.

SAFETY PROFILE

More than 95% of patients will have virtually no complications after LASIK, when done after careful patient selection and using standard techniques. Of the remaining 5%, the complications in most cases are minor, reversible or curable with treatment and not sight threatening.

PROCEDURE

A series of test are conducted before the actual procedure to determine whether patient is suitable for the procedure. These tests are
• Corneal Topography to know corneal curvature
• Pachymetry to know corneal thickness
• Aberometry for determining Abnormal aberrations of cornea
• Retinal Examination to see areas of retinal thinning and degeneration

During the Procedure, a partial thickness hinged flap (approximately 160 microns thick) is raised .Laser shots are then applied to the bed of cornea, removing minute amounts of tissue at each laser shot. The number of shots varies with the patient’s spectacle number and is pre-determined by the built in computer in the machine, after this the flap is reposited back which falls perfectly into place.

The thickness of cornea left behind after shaving off the required amount is at least 250-300 microns. This is internationally accepted as safe. Approximately 10 microns of tissue removal corrects 1 diopter of spherical or cylindrical number.
Suitability of a patient for LASIK depends on what his corneal thickness is and what amount of correction is aimed to achieve. Even in those with a high original spectacle number and a relatively thinner cornea, one can inform the patient in advance that in the interest of safety, we will get rid of only part of your spectacle number. Many patients are quite comfortable with wearing thinner glasses after the procedure rather than risk making the cornea too thin.

COMPLICATIONS

1. The commonest complications are under-correction and over-correction. This is because all LASIK machines use complex computer calculations based on the average of thousands of patient data to calculate how much of the corneal stroma to shave to achieve the desired result. However your eye may not behave like the average of these thousands of eyes, i.e. you may heal differently from the average, leading to an under-correction or over-correction. Usually the amount of residual refractive error is 0.5 or less, which is quite compatible with normal vision and nothing further needs to be done.
2. Dry eye’ i.e. a lessening of his normal tear production, needing use of lubricant eye drops for sometimes up to a couple of months.

Wave-front Guided LASIK

Customized LASIK has a higher potential for perfect vision Besides spherical and cylindrical numbers, eyes also have ‘higher-order aberrations. These aberrations are also corrected by the modern LASIK machines that are ‘wave-front’ guided, giving enhanced quality of vision. However, this usually entails burning off of slightly more tissue than standard LASIK, hence they are not suitable for all cases
Aberrometry test is performed to determine if you have significant higher order aberrations and also determine if your residual corneal bed at the end of the procedure will be thick.

EPI-LASIK

Epi-Lasik is a new advanced Lasik Procedure. Epi-Lasik is the treatment of choice for patients with very high glass numbers.
Epi-Lasik is similar to Lasik but with slightly different benefits. One enormous benefit of Epi-lasik is that it may allow patients with thin corneas who do not qualify for Lasik, to improve their vision perfectly and very safely with laser technology. Like Lasik the visual recovery is fast and very safe.

Frequently Asked Questions

How old do I have to be for Laser vision correction?
You need to be over 18 years of age, and you’re Glasses prescription should not have changed in the last year.

How successful is Laser vision correction?
Our goal and commitment is to get you to a level of 6/6 (20/20) or better, enough to function without Glasses, to watch TV, play sports and take up occupations where good vision is a must.

Will the procedure hurt?
There is no pain during any of the Laser vision procedures since anesthetic eye drops numb your eyes, although some patients may experience mild discomfort or a pressure sensation during their procedure. After LASIK, you may experience mild irritation for a few days, but that’s normal. An over-the-counter pain reliever or use of artificial tears will generally take care of this discomfort.

Will I need to wear shaded Glasses to protect my eyes?
It is not necessary to use protective Glasses. However, you should try to minimize chances of any accidental injury to the eye.

Should both the eyes be operated at the same time?
This is what we recommend. Most patients prefer to have both eyes operated on the same day, as it is convenient. Also this helps avoid imbalance between the two eyes.

How long does the procedure take?
In the Laser room your eyes will be thoroughly cleaned and prepared for surgery. The surgery usually takes only 10 minutes. The patient will not have to spend more than 2 hours at our clinic which includes the time taken to perform the surgery.

Can I wear coloured Contact Lenses?
Yes, you can.

Will I require constant monitoring and check-ups?
Initially a couple of follow-up visits to the Doctor are required. After that you come for a check-up, if required.

How long will it take for me to see well?
Most people achieve good vision the day after surgery and find that their eyes feel fairly normal 24 hours later. However, your sight may improve ever further, and the very best vision can still take one week to ten days.

How soon can I resume my normal activities after LASIK?
Usually there is a mild amount of soreness, watering and discomfort on the first day. One can resume office after 24-48 hours. There is no restriction on any visual activity such as TV, computers or reading following the procedure

 
 
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