Wavefront%20Guided%20LASIK%20Eye%20Surgery

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Wavefront Guided LASIK Eye Surgery
Vi Tran BME 181 Feburary 25, 2013
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What is It?

• LASIKLaser assisted in-situ keratomileusis
• Invasive and refractive eye surgery which
  corrects vision with use of lasers
• Regular Lasik
• Determines surgery based on eyeglasses
  prescription
• WaveFront Guided Lasik
• A type of eye surgery that is more individualized
  and more precise, a type of
• Better than regular Lasik

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How the Eye Processes Vision

• Goes through cornea
• Iris controls how much light that goes through
  the pupil
• Passes through vitreous humor
• Light reaches to the focal point on retina
• Electrical signals converted into images by
  brain

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What it Corrects

• Corrects mainly Myopia, Hyperopia, Astigmatism

• Myopia- Nearsightedness
• -distance between cornea and retina too long

• Hyperopia-Farsightedness
• -distance between cornea and retina is too short
• Astigmatism-blurry vision because cornea has
  football shape
• -light is refracted in multiple areas of the
  retina
• Other abnormalities that cannot be correct by
  regular Lasik

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Before Surgery

• Doctors use WaveScan to create a 3D image of eye
• Individualizes Surgery
• Iris Recognition
• Information gathered used during surgery

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Surgery
1. Numbing drops added, eye holder used to keep
eye open
2. Circular flap created in front of cornea, done
either two ways a. Microkeratome b. Femtosecond
Laser
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Surgery (Continued)
3.WaveFront Guided excimer laser shots beams into
eye to reshape cornea
-20-50 seconds per eye -computer controlled using
information gathered from WaveScan -Eye Tracking
Technology 4. Flap is placed back, patient is
required to wear protective glasses
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Results/Benefits of WaveFront Lasik

• 2-3 months for vision to reach best
• Safe procedure
• Can leave hospital same day
• Higher Chance of getting 20/20 Vision
• Although it is expensive, 5000 but it is a one
  time cost
• Lower chance of losing vision
• Less glares and halos

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Complications Associated

• Very Rare with WaveFront LASIK
• Common Symptoms after Surgery
• Eye Dryness
• Irritation and Inflammation
• Double Vision
• Night Vision
• halos and glares while driving
• Overcorrection or Undercorrection
• Thinning of Cornea
• Additional Surgery

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Statistics and Results

• Total of 12 million people have undergone
  (general)LASIK surgery
• With WaveFront Lasik
• 95 have 20/20 vision
• 74 have 20/15 or better vision
• 25 better than Regular Lasik
• Number of LASIK surgeries are increasing
• Better Technology is developed each year

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References
Questions?
"The Anatomy of the Eye." The Physics Classroom,
2013. Web. 21 Feb. 2013. lthttp//www.physicsclas
sroom.com/class/refrn/u14l6a.cfmgt. Croes, Keith.
"Custom LASIK or Wavefront LASIK Individualized
Vision Correction." All About Vision, Mar. 2011.
Web. 21 Feb. 2013. lthttp//www.allaboutvision.com
/visionsurgery/custom_lasik.ht mgt. "How Does
ILASIK Work?" RedBoxStudio.com, 2013. Web. 21
Feb. 2013. lthttp//adventist-ilasik.com/ilasik/th
e-technology/gt. "LASIK, Eye Surgery." Eye
Surgery Education, n.d. Web. 22 Feb. 2013.
lthttp//eyesurgeryeducation.org/surgery-options-l
asik- about.phpgt. "LASIK." Wikipedia. N.p., 13
Feb. 2013. Web. 22 Feb. 2013. lthttp//en.wikipedi
a.org/wiki/Lasikgt. "What Are the Different Types
of Laser Eye Surgery?" Conjecture Corporation,
2013. Web. 21 Feb. 2013. lthttp//www.wisegeek.or
g/what-are-the-different-types-of-laser- eye-surge
ry.htmgt.