Lasik Laser Refraction
LASIK Laser Refraction What is it?
LASIK Laser Refraction is a relatively new healthcare procedure that corrects nearsightedness. A surgical computer using multiple beam widths and automatic tracking mechanisms to capture the movements of the eye in three dimensions generates precise maps of each eye. This data is then used to apply a micro-fine laser directly to the cornea. Problems with nearsightedness are usually caused due to imperfections in the shape of the cornea. The cornea allows light to enter the eye, and if it is misshapen, the light focuses in front, and not exactly on the retina (the part of the eye that enables us to see distant objects clearly). In LASIK surgery, the cornea is reshaped so light can focus on the retina.
LASIK: The Procedure
LASIK is an outpatient procedure that takes about 15-20 minutes per eye. It can be a strange operation because you are conscious throughout the entire surgery while a device is used to keep your eyelids open. After receiving numbing drops, a suction ring is placed over the eye to create pressure on the cornea. The surgeon, using a knife called a microkeratome, cuts a small flap in the center of the cornea and folds this back to allow for greater access. The laser system is then positioned close to your eye and directed inside, vaporizing the tissue and reshaping the cornea for accurate focusing. Most patients go home without eye gauze, but a transparent eye-shield is provided for maximum safety. The majority of patients can see well within 24 hours, with the full benefits being realized within 1 to 2 weeks.
Visual Results with LASIK
Though a short procedure, LASIK surgery is also a delicate one, the eyes being a vulnerable organ. As a result, it is important to follow the guidelines that the doctor will set out.LASIK nearly always results in improved vision without correction. However, LASIK is an imperfect procedure, and does not always result in 20/20, or even 20/40 visual acuity. Lenses affect the shape of the cornea, and it takes time for them revert to their natural shape which is critical for a successful operation.