LASIK & Refractive Eye Surgery

What is Lasik surgery?

Before you know what Lasik is, you need to understand essentially how the eye functions:

Our eye works just like a camera, with the front glass of our eye called the cornea, bending the light rays inwards and the light getting fine focused with the help of a lens on the camera film called the retina. Finally, the fibres from the film/retina make a wire/ optic nerve that takes all the signals from the camera (eye) to the computer (brain).

If the eyeball is longer or shorter than normal or the shape of the cornea is deviant from normal, a person needs to wear glasses or contact lenses to help focus the light on the eye camera film (retina).

We can’t change the length of the eyeball, but we can surely remove glasses by working on the cornea or on the lens. The process by which the shape of the cornea is remodelled so that you don’t need glasses anymore is called Lasik.

Laser in-situ keratomileusis or Lasik eye surgery corrects refractive errors. Lasik surgery altogether eliminates the necessity of spectacles or corrective lenses.

The Cornea: An insight

What is the cornea?

The cornea is a transparent, front part of the eyes that is responsible for allowing the light to enter into the eye for good vision. The cornea bends or refracts light as and when it hits the lens.
The cornea has five layers, namely

The epithelium

It covers the front part of the cornea and is made up of epithelial tissue

Bowmans layer

It is a connective tissue between corneal epithelium and stroma.

The corneal stroma

It is the thickest layer of the cornea that consists of organized collagen.

Descemets membrane

Descemets membrane lies between stroma and endothelium. It is composed of different types of collagen fibres.


Endothelium is the innermost layer of the cornea and consists of a single layer of cells.

To perform a spectacle removal surgery, surgeons need to expose the layer, which, when worked upon, will produce permanent results.

What are the different kinds of refractive errors?
There are four types of refractive errors

Myopia ( Nearsightedness Hyperopia (Farsightedness) Astigmatism Presbyopia
For people with myopia, distant objects seem blurry, while nearby objects appear to be clearer. It happens because of the mismatch in focusing power and eye length. It is a common vision problem in which people see distant objects clearly, but objects nearby may seem blurry. This condition is also known as farsightedness. This happens when the cornea flattens or curves unevenly. It disrupts the focus of both near and distant vision. Many people suffer from a combination of myopia, hyperopia with astigmatism. hyperopia with astigmatism. It refers to long-sightedness caused by the loss of elasticity of the eye lens generally occurring in the middle and old age. It is also called the ‘Aging Eye’ condition.
Contact us to Book an Appointment for Laser Vision Correction Today

Why Choose Centre for Sight for Lasik surgery (laser operation for eyes)?

FDA approved technology

Offer advanced treatment like Femto laser eye surgery (bladeless Lasik) and SMILE laser eye surgery

Provide cost-effective vision correction procedures

Corneal tissue saving

Types of laser Refractive surgery

Lets understand different types of laser refractive surgeries:

1. Surface laser treatments

There are three kinds of advanced surface ablation refractive surgery; PRK, Lasek and Epi Lasek. All of these techniques use an excimer laser to alter the shape of the cornea from the front surface. Advanced surface ablation does not involve creating a flap and preserves more tissue.

  • It can be an option for people with thin corneas
  • Useful for those having corneal scars
  • Useful for low levels of correction
  • Longer recovery
  • Can be discomforting

Before Lasik surgery was developed, surgeons performed photorefractive keratectomy or PRK. Photorefractive keratectomy is a first-generation laser refractive surgery where a manual instrument is used to remove the outer layer of your cornea, called the epithelium. Then, an excimer laser is used to reshape your cornea so that your vision is improved.

2. Lasik surgery

Lasik surgery involves creating a thin flap on the cornea (front clear glass-like dome of the eye) with a femtosecond laser or microkeratome. This exposes the underlying corneal tissue. Then, Lasik specialists use an excimer laser to reshape the cornea in a unique pattern for each patient. Post-surgery, light rays bend appropriately and focus on the sensitive film of the eye called the retina. The result is a sharper and clearer vision.

Blade Lasik surgery

Blade Lasik surgery, also known as traditional Lasik, uses a microkeratome blade to cut a flap into the cornea. Then, Lasik specialists lift the flap to allow lasers to reshape the cornea. The extreme sharpness of the microkeratome blade helps the corneal flap to fit back in place allowing the eyes to heal.

Blade vs Bladeless Lasik

Pros and cons of traditional Lasik (Blade Lasik)

  • The traditional method or blade Lasik is being performed for more than 30 years now
  • Cost effective
  • Is less precise as compared to bladeless Lasik and gives thicker flap Planar flap is created.
  • Chances of flap related complications are higher

Pros and cons of bladeless Lasik (laser created flaps)

  • Laser created flaps are predictable and have consistent thickness throughout
  • Offers the lowest risk for flap complications, including decreased risk of corneal abrasions
  • Good options for patients with thinner or more curved corneas
  • Temporary light sensitivity
  • Offers better vision post-surgery
  • Rarely requires subsequent touch up surgery

3. ReLex SMILE surgery

During this eye surgery, surgeons do not make any flap and remove a thin layer of the cornea with a specialized and most advanced laser eye surgery system called SMILE (Small Incision Lenticule Extraction). With advanced technology in place, laser operation for eyes is considered as the best option for treating all kinds of refractive errors.

4. Presbyond or laser blended vision

Presbyond laser blended vision is a treatment for people who have an age-related vision disorder, known as presbyopia. As we age, the natural lens of our eyes starts losing its flexibility. It results in the loss of our ability to near-focus.

Presbyond laser treatment is suitable for people suffering from presbyopia. It is primarily used to compensate for reading glasses, though it can also be combined with correction for refractive errors like shortsightedness, farsightedness and astigmatism. Many patients above the age of forty consider going for presbyond laser blended vision while going for any laser vision correction.

Presbyond laser treatment procedure

Before starting with the treatment, the patients eyes are numbed using anaesthetic eye drops. A lid speculum is fitted to keep the eyes open and stop it from blinking. A vacuum ring is placed over your eye while a femtosecond laser creates a tiny corneal flap. Then, the flap is lifted, and the exposed cornea gets treated with the excimer laser. The flap is repositioned, and the procedure is repeated for the other eye.

Benefits of Presbyond laser treatment

  • Works like Lasik
    : Presbyond laser treatment is an advanced form of Lasik vision correction. It uses a well-established procedure with proven long term results.
  • Customized treatment:
    Presbyond laser treatment is always tailor-made based on an individuals requirements
  • Minimally invasive and offers quick recovery:
    People who have undergone presbyond laser treatment can experience clear vision within 48 hours after the procedure.

Avail Femto Lasik (Bladeless Lasik) Surgery from Centre for Sight

What is Femto Lasik (Bladeless Lasik) surgery?

  • Femto laser eye surgery is an entirely bladeless Lasik, which is done in two different stages. Femto laser eye surgery which uses two ultramodern and ultra-precise laser systems. The first laser system known as Femtosecond laser creates a 22 mm flap, and the second laser uses an excimer system to reshape the exposed corneal tissue or stroma.
  • Femto laser eye (bladelessLasik) surgery is also suitable for patients with extremely thin cornea as the laser creates a minimally thin and even flap.

Am I a suitable candidate for Femto Lasik?

To undergo Femto Lasik, the candidate should be:

Between 18-60 years of age

Your refractive error should be stable for at least a year

Having refractive error between -12 and +6 D

Not having irrelevant eyeball dimensions

Have a healthy cornea

Not be pregnant or nursing

Not having autoimmune diseases

Advantages of Femto Lasik
(Bladeless Lasik)

Femto Lasik (Bladeless Lasik) surgery is safe Femto Lasik (Bladeless Lasik) surgery is more accurate Femto Lasik (Bladeless Lasik) surgery is fast
Eyes do not get in contact with the blade Femto laser eye surgery (Bladeless Lasik) is more accurate as the laser separates the cornea from lower layers smoothly= Femto laser eye surgery (Bladeless Lasik) eliminates the chances of inflammation after the Lasik surgery procedure
Femto laser eye surgery (Bladeless Lasik) surgery uses a femtosecond laser that is entirely monitored by the computer The beam work of the laser can be observed and controlled The measurement of the flap is easily manageable, according to the patient's particularities
Femtosecond laser system is quick. The frequency of laser impulse is measured in Megahertz The ladder process takes 15-20 seconds and the whole procedure is over in less than 15 minutes

Femto Lasik eye surgery risks

Dry eyes

After LASIK, your eyes may have decreased tear film stability, which can make you feel unusually dry as they heal. You can use eye drops during this time to keep your eyes moist as recommended by your doctor.

Glare halos

You may experience glare and double vision, especially while driving at night. This condition may not last for more than a few days.


When the laser removes fewer tissues than required from your eyes, the vision will not be as sharp as expected. If such a situation arises, you are required to go through another LASIK within a year.


The incision made during SMILE surgery is only 2mm wide, far less invasive than the 20mm one made in LASIK or the 8mm one done during PRK procedures.

Choose SMILE Vision Correction For Spectacle Removal From Centre for Sight

What is SMILE eye surgery?

Small Incision Lenticule Extraction or SMILE laser eye surgery is a blade-free laser vision correction procedure that does not require corneal flap.

ReLex SMILE eye surgery (a laser operation for eyes) is a fully automated next-generation procedure that gives long-lasting and stable results.

Choose SMILE Lasik eye procedure if you want laser vision correction procedure to be:

● All Laser

● Bladeless

● Flapless

● Minimally invasive

● Keyhole surgery

● Safe and painless

Learn More

SMILE vs. Blade-Free LASIK/Contoura

Alternate Names RELEX/Refractive Lenticule Extraction iLASIK/Wave-Lasik/Contoura Vision/Robotic Lasik
Incision size 22mm Diameter Flap Cut 2mm - Keyhole Surgery
Dry eye Dry Eye Common Less to no dry eye in comparison with Lasik
One day WOW May Have A 'One Day WOW' In up to 80% cases 'WOW' Clarity takes up to 48 hours
Long term stability of correction Lesser Higher
Need for treatment Higher Lesser
Ease of retreatment Yes Yes

What is Contoura & Personalised LASIK?

Personalized Lasik is a bladeless procedure that utilizes a more customized technology called wavescan that measures the aberrations unique to an eye. This personalized/customized treatment creates a 3-D image of the eye. It examines aberrations and calculates how to better the vision while maintaining the shape of the cornea.

Contoura vision utilises the shape of the cornea also known as topography for personalisation but still uses the excimer laser only. It creates a flap of 22 mm cut size thus coming with potential disadvantages of flap related problems and dry eyes, unlike SMILE, which works on the most advanced femtosecond laser platform. Corneal topography maps the curve of your eye, showing issues like swelling, scarring, or astigmatism. Hence contoura may have certain advantages only in corneas that are irregular or scarred.

This personalized treatment has been around for a decade and continues to be marketed in different avatars like "Contoura Lasik." The treatment, however, requires a flap & hence carries the same safety profile as Lasik.

Looking for the best Lasik surgery in India?

Centre for Sight is one of the best eye hospitals for Lasik surgery, bladeless Lasik surgery (Femto laser eye surgery), and SMILE eye surgery.

Our team of Lasik and refractive surgeons is one of the leading teams that specialize in offering the best laser eye surgery in India. If you have been searching for the best Lasik surgery in Delhi, Hyderabad, or any other city across India, then look no further than Centre for Sight. Our eye hospitals are available across many cities.

We have one of the best teams of doctors, surgeons, and consultants who use state-of-the-art-technology to diagnose the patient’s eye with accuracy and then recommend the correct treatment.

Contact us to experience one of the best Lasik surgeries in India to enhance your vision. We are renowned for our services across India and are trusted for being one of the best names for offering the best Lasik surgery.

Explore FAQs

What are the risks associated with Lasik laser eye surgery or Lasik surgery?

Risks associated with Lasik laser eye surgery (Lasik surgery) are:
● Dry eyes
● Complaints of glare, double vision, and halos
● Overcorrections
● Under Corrections
● Flap-related issues
● Vision loss or changes
● Regression

Is Lasik surgery procedure painful?

The procedure for Lasik surgery is performed with topical drop anaesthesia and is almost painless. Patients can walk in and out of the operation theatre in a few minutes. Centre for Sight provides one of the best laser eye surgeries in India.

What if laser eye surgery goes incorrect?

Albeit rarely so, but if the laser removes too much/too little tissue from your eye, you will not get clear vision results you were hoping for. A repeat Lasik surgery procedure can correct this after the eye heals fully.

How much time does it take to have a clear vision post Lasik laser eye surgery or Lasik surgery?

Most of the blurriness goes away by about the next day, though the clarity gradually increases over a couple of weeks after the Lasik surgery procedure. Call us to know anything about the best laser eye surgery.

Aftercare and recovery post Lasik laser eye surgery (Lasik surgery)

  • Cover your eyes with dark glasses just after the
  • surgery is done. It will prevent you from inadvertently rubbing your eyes.
    ● Your eyes will be re-examined before you leave to ensure that the flaps are fine.
    ● Arrange someone to take you home as immediate driving is not advised.
    ● Take eye-drops and follow, do/don’ts as advised by the doctor.
    ● Do visit the doctor as you will be reviewed soon (a day or two) after surgery and periodically after that. Your vision will be evaluated, and corneal shape measured.

    Why can Lasik laser eye surgery (Lasik surgery) be better than contact lenses?

    Lasik laser eye surgery (Lasik surgery) can be better than contact lenses in the number of ways:
    ● Lasik laser vision correction provides a long-term solution to the problem, whereas contact lenses offer a temporary way to live with the refractive error. Also, the long term cost-benefit ratio also gets skewed towards even the most expensive form of Refractive surgery than contact lenses.
    ● Laser vision correction procedures allow people to see without any visual aids, whereas contact lenses need to be maintained, replaced, and taken care of in general.
    ● Contact lenses increase the risk of eye infections and corneal ulcers, while LASIK doesn’t come along with these risks.

    Can you blink during LASIK surgery?

    During the surgery, Lasik laser eye specialists put a speculum on the eyes to prevent blinking. No, your eyes are anaesthetized before the surgery and then prevented from blinking or closing with the help of a speculum.

    Can I watch TV or use mobile phone post-Lasik laser eye surgery or post-Lasik surgery?

    Post-Lasik laser eye surgery (Post Lasik surgery), you can watch TV or use a mobile phone, but you will feel uncomfortable. It disturbs the healing speed. Its better to take rest for a week or two before getting into routine life.

    Can I see immediately after Lasik laser eye surgery?

    Yes, you can see post-Lasik surgery, but the vision will remain blurred. Laser operation for eyes gives you a spectacle free world. It gives you independence from contact lenses.

    Can I bathe after the Lasik surgery procedure?

    Yes, but it is advised to take a below-the-neck bath after Lasik surgery. Laser operation for eyes is sensitive; hence all precautions should be taken so that the patient gets the expected results.

    When is Lasik eye surgery procedure not recommended?

    Certain health conditions increase the risk of the laser eye surgery procedure. Eye specialists wont recommend Lasik eye surgery if you have:
    ● Any autoimmune disorder
    ● A weak immune system
    ● Dry eyes for a long time
    ● Eyelid disorders, eye injuries, inflammation of the cornea
    ● Recent changes in vision due to pregnancy, hormonal changes, medications, etc.

    What is Contoura Lasik?

    Contoura Lasik is also a type of laser eye operation that comes with minimum side effects and complications.
    ● It has gained popularity for the reasons that it does not use any blades during the procedure, just as in Femto Lasik or Lasik procedures.
    ● It uses an all-laser technique, hence assures safety and precision.
    ● It may offer some advantage in irregular corneas for personalizing the treatment.

    How to choose for the best Lasik surgery in India?

    You can choose for the best Lasik surgery in India by doing a check on a few things, like:
    ● Research online about services, ratings, testimonials, etc., before setting your mind for Lasik eye operation.
    ● Check for the facilities and services offered by the hospital for Lasik eye operation.
    ● Look for the years of experience of the doctor and the hospital, both for Lasik eye operation.
    ● Take feedback from the people who have already successfully undergone surgery Lasik eye operation. Centre for Sight is proud to be associated with a highly competent and experienced set of eye surgeons at our different locations in India. We offer Lasik eye surgery in Delhi and Hyderabad, amongst many other centres for your eye care.

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