Transcript LASIK Eye Surgery

Wavefront Guided LASIK
Eye Surgery
Vi Tran
BME 181
Feburary 25, 2013
What is It?
• LASIK=Laser 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
How the Eye Processes Vision
1. Goes through cornea
2. Iris controls how much
light that goes through
the pupil
3. Passes through
vitreous humor
4. Light reaches to the
focal point on retina
5. Electrical signals
converted into images
by brain
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
Before Surgery
•Doctors use WaveScan to create a 3D image of eye
•Individualizes Surgery
•Iris Recognition
•Information gathered used during surgery
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
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
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
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
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
References
Questions?
"The Anatomy of the Eye." The Physics Classroom, 2013. Web. 21 Feb.
2013.
<http://www.physicsclassroom.com/class/refrn/u14l6a.cfm>.
Croes, Keith. "Custom LASIK or Wavefront LASIK: Individualized Vision
Correction." All About Vision, Mar. 2011. Web. 21 Feb. 2013.
<http://www.allaboutvision.com/visionsurgery/custom_lasik.ht
m>.
"How Does ILASIK Work?" RedBoxStudio.com, 2013. Web. 21 Feb. 2013.
<http://adventist-ilasik.com/ilasik/the-technology/>.
"LASIK, Eye Surgery." Eye Surgery Education, n.d. Web. 22 Feb. 2013.
<http://eyesurgeryeducation.org/surgery-options-lasikabout.php>.
"LASIK." Wikipedia. N.p., 13 Feb. 2013. Web. 22 Feb. 2013.
<http://en.wikipedia.org/wiki/Lasik>.
"What Are the Different Types of Laser Eye Surgery?" Conjecture
Corporation, 2013. Web. 21 Feb. 2013.
<http://www.wisegeek.org/what-are-the-different-types-of-lasereye-surgery.htm>.