There are numerous variations of laser refractive surgery. LASIK eye surgery is the best known and most frequently performed. In many articles, including this one, the term “LASIK” is used to refer to all types of laser eye surgery.
Normally, the images are focused on the retina at the back of the eye. With myopia, hyperopia, or astigmatism, they end up focusing elsewhere, causing blurry vision.
- Myopia is a condition in which one sees near objects clearly, but distant objects are blurred. When the eyeball is slightly longer than normal or when the cornea has a very sharp curve, light rays are focused in front of the retina, blurring distant vision. You can see objects that are close more clearly, however, the opposite happens when objects are far away.
- Farsightedness is a condition in which one sees far objects clearly, but near objects are blurred. When the eyeball is shorter than average or the cornea is very flat, light is focused behind the retina instead of on it. This makes near vision and sometimes far vision blurry.
- Astigmatism causes general blurred vision. When the cornea has a curvature or uneven flat surface, the result is astigmatism, which disturbs the focus of near and far vision.
Traditionally, blurred vision is corrected by bending (refracting) light rays with glasses or contact lenses. But reforming the cornea (the transparent dome-cut tissue before the eye) will also deliver the essential refraction and vision improvement.
Before a LASIK Eye Surgery, the kraff eye institute eye surgeon will evaluate the detailed measurements of the eye. It will then use a special type of laser cutter to precisely alter the curvature of the cornea. With every singlelaser beam pulse, a small quantity of corneal tissue use to be removed, letting the eye surgeon to flatten the cornea curvature or make it more definite.