1. Wavefront Guided LASIK Eye Surgery
Vi Tran
BME 181
Feburary 25, 2013

2. 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

3. 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

4. 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

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

6. 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

7. Surgery (Continued)
3.WaveFront Guided excimer laser shots beams into eye to reshape cornea
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

8. 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

9. 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

10. 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

11. Questions?
References
"The Anatomy of the Eye." The Physics Classroom, Web. 21 Feb <
Croes, Keith. "Custom LASIK or Wavefront LASIK: Individualized Vision Correction." All About Vision, Mar Web. 21 Feb < m>.
"How Does ILASIK Work?" RedBoxStudio.com, Web. 21 Feb <
"LASIK, Eye Surgery." Eye Surgery Education, n.d. Web. 22 Feb < about.php>.
"LASIK." Wikipedia. N.p., 13 Feb Web. 22 Feb <
"What Are the Different Types of Laser Eye Surgery?" Conjecture Corporation, Web. 21 Feb < eye-surgery.htm>.