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Need an argumentative essay on Investigative Paper on Lasik Surgery. Needs to be 5 pages. Please no plagiarism.Download file to see previous pages... Doctors also put a pneumatic suction ring on the e
Need an argumentative essay on Investigative Paper on Lasik Surgery. Needs to be 5 pages. Please no plagiarism.
Download file to see previous pages...Doctors also put a pneumatic suction ring on the eye and intraocular pressure is raised to about 65mmhg which prevents the eye from rolling around in the patient's head. The doctor then uses a microkeratome4 or a femtosecond laser to cut a three-sided flap in outer layer of the cornea. The cut is between 100-180 microns deep depending on the patient and includes the epithelium and Bowman's Membrane. The flap is pealed back to reveal the stromal layer and an excimer laser 5 beam is used to remove part of the cornea, thereby reshaping it. This process is known as ablative photo-decomposition. The flap is then folded back onto the eye and will self-adhere to the remainder of the cornea. The convalescence period is generally 3-6 months.
Study after study proves the overall safety and effectiveness of LASIK. In a 1996 study involving 62 severely myopic eyes, the LASIK procedure improved the mean refraction from -14.80 D to -1.7 D.6 The mean regression7 of myopia was just -.2 D (Knorz, et al, 1996 a). Another study shows similar results for moderately myopic eyes. In this instance LASIK surgery improved the mean refraction of the eyes from -14.3 D to -1.4D (Knorz, et al, 1996 b). In hyperopic eyes, results were similar. ...
After 6 months, 100% of cases in group A and 95.3% of the cases in group B were within +/-1.0D of emmetropia. However, LASIK improved vision to this degree in only 71.4% of the eyes in group C (Argento &. Costino, 1998).
There are some troubling side-effects that are common among people who have had LASIK surgery. A meta-study published in the European Journal of Medical Research found that over-correction, under-correction and regression occurred in patients 24% of the time and the hazy vision occurred in 15% of post-operative LASIK patients (Lamparter, et al, 2005). One study undertaken in Japan shows that LASIK had over a 95% effectiveness rate but that in 10.5% of the cases, there was hemorrhage of the corneal limbus during surgery. DLK, a condition in which the cornea begins attacking itself, occurred in 2.3% of the eyes. .04% of the eyes studied developed an infection and epithelial in-growth occurred in .1% of the eyes (Sun, et al, 2005). Many smaller studies bear out the findings of the meta-studies. According to a study performed by Robert T. Lin and Robert T. Maloney, the flap of cornea did not heal properly after LASIK 8.6% of the time (Lin &. Maloney, pg 129). Another common complication is the development of dry-eye. A 2005 study showed that among Caucasians, LASIK surgery increased the incidence of chronic dry-eye from 5% to 7% of the population (Albeitz, et al, 91).
Some complications of LASIK, such as over-correction, under-correction haziness and regression, result in the surgery having to be performed again.
