LASIK is a laser eye surgery that corrects refractive error.
LASIK is a type of refractive surgery. This kind of surgery uses a laser to treat vision problems caused by refractive errors. You have a refractive error when your eye does not refract (bend) light properly.
For you to see clearly, light rays must travel through your cornea and lens. The cornea and lens refract the light so it lands on the retina. The retina turns light into signals that travel to your brain and become images. With refractive errors, the shape of your cornea or lens keeps light from bending properly. When light is not focused on the retina as it should be, your vision is blurry.
More than 32 million LASIK procedures has been done till date world wide. Making it the most common elective vision correction procedure throughout the world.
What is LASIK?
LASIK is a laser-assisted surgery for correction of refractive error. If you are planning or eager to get rid of spectacles and contact lenses, LASIK is the answer
- Is a simple and safe procedure
- Has minimal discomfort
- Leaves no scar
- Has fast recovery
- Has very few complications
- Enchancement is possible
Who is a good candidate for LASIK surgery?
To have LASIK surgery, you need to meet certain requirements. Here are some of them:
- You should be 18 years or older (ideally, over 21 years old, when vision is more likely to have stopped changing).
- Your eye prescription should not have changed much in the last year.
- Your corneas need to be thick enough and healthy, and your overall eye health must be generally good.
To determine whether you are a candidate for LASIK, here is what will be done:
- The overall health of your eyes will be checked.
- Measurements of your cornea will be taken.
- Your pupil size will be checked.
- Your refractive error will be measured.
- Test your vision.This is to make sure that your vision has not changed. It also shows how high your refractive error is and whether
- LASIK can be used to correct your vision.
- Check for other eye problems.Your ophthalmologist will make sure that you do not have eye problems. This is because other problems could affect your surgery, or LASIK could make those other problems worse. For example, if you have dry eyes, they may be worse after LASIK.
- Measure and map the surface
ALTERNATIVE OF LASIK
Photorefractive kertectomy (PRK)
This was the most popular laser procedure for correcting refractive errors before the advent of LASIK. Here the laser is applied to the corneal surface. Since the epithelium (surface layer of the cornea) is removed, this leads to greater activation of inflammatory mediators and better healing.
The problems encountered in the early post-operative period with PRK are more painful (because of epithelial defects), and delay visual rehabilitation as it takes 3-4 days for the epithelium to heal.
Early visual recovery, more comfort, practically no haze and very little regression (not in all cases) are the advantage of LASIK over PRK. PRK is preferred in cases with borderline corneal thickness where LASIK might be risky.
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Vision after LASIK
About 9 out of 10 people (90%) who have LASIK end up with vision between 6/9 and 6/6—without glasses or contact lenses.
It is important to know that LASIK cannot correct presbyopia. This is the normal, age-related loss of close-up vision. With or without refractive surgery, almost everyone who has excellent distance vision will need reading glasses after around age 40.
To help with presbyopia, some people have LASIK to get monovision. This means one eye is left slightly nearsighted and the other eye is adjusted for distance vision. The brain learns to adapt so that the nearsighted eye is used for close work, while the other eye sees distant objects. Monovision is not for everyone. To see if you are able to adapt to this correction, you will probably want to try monovision with contact lenses first.