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LASIK Eye Surgery Mumbai

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Title: LASIK Eye Surgery Mumbai


1
Lasik Eye Surgery Mumbai
  • http//lasikeyesurgerymumbai.in/

2
  • LASIKor Laser-assisted in situ keratomileusis -
    commonly known as laser eye surgery or laser
    vision correction.
  • Refractive
    Corrective Surgery

astigmatism
myopia
Hyperopia
3
Facts
  • LASIK surgery performed by ophthalmologist.
  • Reshaping of the cornea of eye done by laser or
    microkeratome.
  • LASIK provides permanent alternative to
    eyeglasses or contact lenses.
  • Till 2009 28 million LASIK procedures had been
    performed worldwide.
  • Photorefractive keratotomy (PRK) is another
    corrective surgical procedure for refractive
    errors in eye.
  • People with very thin cornea or very high myopia
    cannot undergo LASIK or PRK but can get
    implantation of phakic intraocular lens.

4
Risk
  • The potential risks and effectiveness were
    evaluated by the British National Health
    Institute for Health and Clinical Excellence in
    2006 and it was stated current evidence suggests
    that photorefractive surgery for the correction
    of refractive errors is safe and efficacious for
    use in appropriately selected patients.
  • Surveys of LASIK in 2008 reports satisfaction of
    92 to 98 percent. Data from 1998 till 2008 showed
    95.4 percent patient satisfaction (American
    Society of Cataract Refractive Surgery).
  • Moris Waxler, former FDA official involved in
    LASIK approval claimed that procedure had a
    failure rate of more than 50. But the same was
    denied by the FDA.
  • Small percentage of patients may need another
    surgery. And some may require to use glasses or
    contact lenses even after treatment.

5
  • Presbyopia A condition in old age in which one
    or both the eyes show diminished ability to focus
    on near objects. This may be due to loss of
    elasticity of the crystalline lens.
  • A type of Lasik called Presbylasik, can prove
    helpful for correctionof visual acuity in
    presbyopia.

6
Loss of vision due to infection The risk of
vision loss due to infection is greater in
contact lens wearers(12,000) than in infection
from LASIK( 110,000)

  • Risks

7
  • Higher-order aberrations these are visual
    problems requiring special diagnosis and cannot
    be corrected with normal spectacles.
  • There has been observed correlation between size
    of pupil and aberration, occurring more at night
    when size of pupil is greater.
  • Light passes from the edge of flap and gives rise
    to aberrations that are spherical in nature.
  • Aberrations have also been proposed to be
    pre-operative and have very small size of the
    order of micron and could not be corrected with
    laser beam which are nearly 1000times larger
    (0.65mm)

8
  • Dry eyes few patients experience a dry eyes
    after LASIK. Although this condition may be
    temporary but it can develop into a dry eye
    syndrome.
  • Treatments Artificial tears, Prescription tears,
    Punctual occlusion.
  • Punctual Occlusion technique of plugging the
    tear(puncta) duct with collagen or silicone
    device and preventing drainage of eye.
  • Some patients may not experience any relief
    despite treatments and develop permanent dry-eye
    syndrome.
  • Individuals with pre-existing dry-eye conditions
    such as Sjogrens syndrome should not be treated
    with LASIK.

9
  • Halos, starbursts and bright lights are
    experienced by some post-LASIK patients. The
    widening of pupil in low light conditions cause
    it to be largerthan the flap. The stromal changes
    in the passage of light cause visual distortion
    of light experienced in form of halos.
  • The pre-operative examination of eyes for wider
    pupils can reduce risk of this complication.

10
  • Other complications include
  • Flap complications (0.244) displaced or folded
    flaps, epithelial ingrowth). The risk dexreases
    with increased physician experience.
  • Slipped flap- when corneal flap detaches from the
    rest of the cornea. Patients are given sleep
    goggles to prevent them for dislodging the flap
    during sleep. Short operation time decreases this
    risk as the flap does not dry easily.
  • Traumatic flap dislocations have been reported
    even after 7 years of LASIK.
  • Flap interface particles various sized particles
    with different reflectivities (38.7 cases).
  • Infection (0.4 cases)
  • Post-LASIKcorneal ectasia a condition where
    cornea bulges forward after LASIk resulting in
    irregular astigmatism.

11
  • Subconjuctival haemorrhage Reportedly in 10.5
    cases.
  • Corneal scarring permanent problems with
    corneas shape making it difficult to wear
    contact lenses.
  • Retinal Detachment reportedly in 0.36 cases.
  • Uveitis 0.18
  • Decrease in atmospheric pressure at higher
    altitudes has not been demonstrated as highly
    dangerous to post LASIk patients but some people
    experience myopic shift at very high altitudes.
  • Complications may be categorised as
    pre-operative, intra-operative, early
    post-operative or late post-operative. According
    to UK National Health Service, these occur in
    less than 5 cases.

12
  • The risks andbenefits of the LASIK refractive
    procedures should be weighed based on the
    personal value system and bias should be avoided
    through not getting influenced by others having
    undergone the procedure.
  • The procedure consists
  • Creating a thin flap
  • Folding it to enable remodelling of underlying
    tissue with laser
  • Repositioning the flap

13
  • Pre-operative procedures
  • Patients who used soft contact lenses are
    required to stop wearing them from 5 to 21 days
    before the surgery.
  • Those wearing hard contacts should stop wearing
    them 6 weeks prior to the surgery. The duration
    should be increased by 6 more weeks for every 3
    years of wearing hard contacts. The cornea
    should be sufficiently avascular before the
    surgery. The contacts which prevent oxygen supply
    to cornea lead to neo-vascularisation and this
    can cause greater bleeding, pain in surgery.

14
  • Patients eye prescription should be stable or at
    least one year prior to surgery. The patients
    cornea are examined with a pachymeter to their
    thickness. Using low-power lasers, a topographer
    creates a topographic map of cornea.
  • For more details visit http//lasikeyesurgerymumba
    i.in/
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