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Most Common Questions about Eye Surgeries


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Frequently Asked Questions

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  • Quick diagnosis
  • Complex medical tests
  • Early identification and intervention
  • Complex surgical interventions

How old do I Have to be for laser vision correction?

You need to be over 18 years of age, and your glasses or contact lens prescription should not have changed in the last year. If your eye is still changing from year to year, you should not have the procedure until the cornea is stable.

What are the diagnostic tests done before one can undergo LASIK procedure?

Besides routine eye examination two preoperative tests viz. Topography Test & Pachymetry Test need to be performed. Topography Test is done to map the refractive power of the cornea and to rule out certain corneal conditions like conical cornea, etc. The Pachymetry Test is done to measure the thickness of the cornea.

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 might experience mild irritation for a few days after your procedure. An over-the-counter pain reliever or use of artificial tears will generally take care of this discomfort.

Can I have both eyes operated upon at the same time?

This is what we recommend. It has been demonstrated in several large, clinical studies that LASIKs results and safety are identical whether the procedure is reformed on both eyes simultaneously versus one eye at a time. Most patients elect to have both eyes operated upon the same day out of convenience, less time out of work, and avoiding imbalance between the two eyes.

How Long does the procedure take?

Once in the laser room your eyes will be cleaned and prepared for surgery. The surgery itself usually only takes five minutes or so per eye, however the preparation process of surgery may vary between 3 to 6 hours depending on technology and procedure chosen.

Will I have 20/20 vision following laser vision correction?

The goal of any refractive surgical procedure is to reduce your dependence on corrective lenses. However, we cannot guarantee you will have 20/20 vision as a result. Our commitment to you is that we will not perform laser vision correction on you or anyone we feel does not have a good possibility of achieving independence from glasses and contacts. The vast majority of our patients are extremely happy with their results and can do most activities without dependence on corrective lenses after laser vision correction.

Is laser vision correction safe?

There are possible risks with any surgical procedure. Serious complications with LASIK are extremely rare. The chance of having a vision-reducing complication from LASIK has been documented in clinical studies to be less than one percent. Many of the risks and complications associated with this procedure can be reduced or eliminated through careful patient selection and thorough pre-operative testing using the latest diagnostic technology. After laser vision correction, you may experience some visual side effects. These are usually mild and most often diminish over a few days to a few weeks. But there is a slight chance that some of these side effects won’t go away completely, such as feelings of dryness, glare and halos. If after a thorough examination we decide you are a good candidate for laser vision correction, you will be given additional information about the procedure that will allow you to make an informed decision about whether to proceed. Be sure you have all your questions answered to your satisfaction.

What about nighttime side-effects?

You have probably seen news stories about people having difficulty driving at night after refractive surgery. Nighttime side-effects may include halos, starbursts, and glare around lights and blurry vision. Some of these can be caused by overcorrection, undercorrection, or residual astigmatism and higher order aberrations (imperfections). These effects usually diminish as the eye heals in the first three to six months. Sometimes additional touch-up (enhancement) procedures will be recommended or the doctor may recommend Wavefront procedure to minimize these side effects. Another possible cause of nighttime side-effects is pupil size. At night, the pupil expands to let in more light. Light coming through the peripheral cornea may be out of focus if the pupil opens beyond the laser treatment area. This is why some patients are not good candidates for LASIK if they have very large pupils. However, our advanced laser technology has expanded treatment zones to the widest optical zone therefore patients that were at one time not candidates for LASIK because they had large pupils, can now be treated.

How long will the results of the surgery last?

Laser vision correction is considered to be permanent. However, your eyes can still change as you age which may cause a need for glasses or contacts or additional vision correction procedures in the future. As people reach their early forties, they develop presbyopia and begin to need reading glasses. If you’re over 40, you may want to consider monovision.

What if I move my eye during the laser treatment?

While the treatment is performed, you will be asked to look at a light under the laser. You are required to look steadily at the light throughout the operation, since this keeps the eye centered under the laser. However, if you temporarily look away or lose the ability to look at the fixation light, do not be concerned. The WaveLight Allegretto Laser is equipped with a special eye tracker that tracks the eye at 400 times a second throughout the procedure.

Do I have to go without my contacts before having laser vision correction?

If you are wearing hard or gas permeable contacts, it’s important that you remove them at least three weeks prior to your exam. Soft lenses should be out for at least one week before your exam. Soft toric lenses may need to be out longer. Your doctor will advise you how long you need to be out of your contacts prior to your exam and prior to your surgery.

Does LASIK cause dry eye?

Following a LASIK procedure, every patient has temporary dry eye, which can be treated most often with artificial tears. This dry eye sensation usually clears up in eight to 12 weeks except in rare cases, where it may take longer. Patients with pre-existing dry eye may not be good candidates for LASIK. If you have dry eye, you should discuss it with your doctor at your pre-op examination. Tests can often diagnose dry eye but it is still somewhat difficult to predict who will experience significant dry eye following LASIK. A thorough evaluation of your current medications, medical history and work environment should all be taken into account.

Can I have laser vision correction while I am pregnant or trying to conceive?

Pregnancy can affect your vision, therefore if you are pregnant or trying to conceive, you should not have laser vision correction. You should wait several months after your pregnancy or after you finish nursing before having laser vision correction.

Can I drive home after the surgery?

No, you will need a designated driver! For the first couple of hours your eyes will be sensitive to light and the vision blurred, so you should wear the special dark glasses that we provide.

I have a "lazy" eye; can I still have LASIK to correct myopia?

Lazy eye encompasses a wide range of visual problems and levels of visual acuity. The only way to know for sure if you are a candidate for LASIK is to come to the office for a consultation with our expert doctors for a thorough evaluation to determine if LASIK will help you. Many patients with lazy eye have enjoyed their results following LASIK because they no longer need glasses or contact lenses to achieve their best acuity.

My son has kerataconus and I would like to know if he is a candidate for laser eye surgery.

Laser vision correction is not suggested for patients with keratoconus. However, it is important to treat this condition to prevent it from progressing. Our very sensitive topolyzer grades the keratoconus and gives us the right treatment plan and rigid contact lens fit.

Common causes of cataract.

While there are no known causes, studies have identified a number of risk factors:

  • Age – Cataracts are a normal part of aging.Occurs as a result of natural aging process of lens,which become opaque over a period of time.
  • Excessive exposure to sunlight.
  • Traumatic Cataract – Develops as a result of any injury to the eye.
  • Metabolic Cataract – Develops as a result of defect in the body metabolism such as: High cholesterol / triglycerides Diabetes Mellitus
  • Calcium Disorders
  • Toxic Cataract – Certain toxic substances or drugs can lead to cataract if taken over a period of time. Eg.: Cortisone medication, Chlorpromazine, etc.
  • Secondary Cataract – Some other primary eye disease such as chronic inflammation or glaucoma can lead to forming of cataract

What is a Cataract?

A cataract is a clouding of the lens of the eye. In a young person, the lens is crystal clear and allows light to pass through and focus on the retina. As the lens ages, the lens nucleus becomes opaque, or opacities form in the lens cortex that block or scatter light resulting in diminision of vision.

What are the symptoms of cataracts?

Painless blurring or dimming of your vision

  • Sensitivity to light and glare, especially in bright sunlight or while driving at may also experience poor depth perception.
  • Increased nearsightedness, requiring frequent changes in your eyeglass prescription. As cataract develops,changing glasses would no longer help improve vision.
  • Distortion or ghost images in either eye

Can Cataracts be prevented?

Currently, there is no proven way to prevent cataract or the development of cataracts other than controlling medical conditions that may be the cause. Antioxidants like beta carotene and vitamins C and E have been identified as reducing the risk of developing cataracts and slowing their progression.

How is a Cataract diagnosed?

We can diagnose the presence of a cataract through a routine eye examination. However, once a cataract is detected, we will monitor its progression. The eye examination evaluates:

  • Visual Acuity – Check vision in both eyes unaided and with best possible corrective glasses and pinhole vision is checked to know the improvement and get the general idea about macular function of the eye. This will help in prognostic evaluation of post operative visual recovery.
  • Intra Ocular Pressure – To rule out rise in pressure secondary to cataract. If raised, surgery is needed to prevent further complications
  • Slit lamp Examination – To know the type of cataract and its progress and any associated eye disease.
  • Direct And Indirect Ophthalmoscopy – To examine the posterior segment of the eye like vitreous and retina.
    A-scan Biometry – Calculate the Axial Length and Intra Ocular Lens Power for implantation.

What surgical techniques are used?

Cataract surgery is almost always an outpatient procedure, done under local anesthesia. During surgery, the lens is removed and replaced with an artificial one (implant) that performs the same function.
Two types of surgical procedures are commonly performed: Extracapsular extraction and phacoemulsification. The extracapsular method has been the standard for over a decade, but with advancing technology in surgical equipment and Intra Ocular lens implants for both methods, phacoemulsification has gradually become the procedure of choice in the majority of cases.

What does cataract surgery entail?

Extracapsular extraction

  • Incision of about 7-8 mm is made.
  • Lens nucleus removed from capsular bag in one piece.
  • Cortical material removed by aspiration (suction).
  • Intra Ocular lens placed in the capsular bag where natural lens was there.
  • Eye sutured with seven to nine nylon stitches.
  • Postoperative astigmatism due to stitches.
  • Removal of some of the stitches after six or more weeks to reduce astigmatism.
  • Corrective glasses after stitches are removed, or when astigmatism subsides (usually six to seven weeks after surgery).


  • Small tunnel incision of 2-3mm near the cornea is made.
  • Lens nucleus is broken into pieces and removed from capsular bag by ultrasonic emulsification and suction.
  • Remaining Cortical material removed by aspiration.
  • Intra Ocular lens placed in the capsular bag.
  • No stitch or, in some cases, one stitch to close the small incision
  • Corrective glasses after the eye stabilizes, usually a few weeks after surgery.

Phaco advantages:

Rapid Recovery, Patient can resume their routine almost the next day, Better visual results – little or no astigmatism.

  • Take it easy for the first two or three days after the operation.
  • Resume normal activities including moving around and bending down, but be careful because it’s hard to judge distances with one eye covered.
  • Try not to touch or rub the eye.
  • Keep soap and shampoo out of the eyes (it’s sensible to avoid washing your hair for the first few days).
  • In the first few weeks after the operation, avoid heavy lifting as this can increase the pressure in the eye and could put a strain on the healing scar.
  • If you suffer more than mild pain, or you experience loss of vision or increasing redness of the eye, you should contact the hospital for advice.

Cataract surgery is almost always an outpatient procedure, done under local anesthesia. A small incision is made in the eye, and the front surface of the cataract is opened to allow access to the clouded tissue inside. The cloudy portion is then removed, leaving the thin clear back surface of the lens in place This can be done either with a mechanical device called a phacoemulsifier or manually with extracapsular instruments. The lens implant is then placed in the shell of the natural lens, and the incision is closed.
This can be done either with a mechanical device called a phacoemulsifier or manually with extracapsular instruments. The lens implant is then placed in the shell of the natural lens, and the incision is closed.
Patients return home after surgery, and are usually examined the following day. Eyedrops are used to accelerate the healing process and prevent infection, and patients are instructed to avoid any activity that could harm the eye while recovering from surgery. Vision almost always improves greatly within 4-6 weeks, although many patients may see better within 1-2 weeks or less. Almost everyone will need a new glasses prescription after surgery, although it may be needed only for distance or for reading depending on the choice of lens implant power.

When should a Cataract be surgically removed?

There is presently no medical treatment that prevent cataract or reverse them once they develop. The only treatment for cataract is surgery. Though in initial stages of cataract glasses may help to improve vision. The decision to operate is taken by the patient and the doctor together, depending on how cataract is affecting patient’s lifestyle. With the recent advances in cataract surgery, one does not require to wait till vision drops to finger counting. The sooner the operation is done, the better are the results.