Refractive Surgery: Types Of Correction And How It Works

If you depend on your glasses or contact lenses to see the world clearly, you’ve thought about getting rid of them and simply opening your eyes to see everything you want.

Since grade correction surgery was created, this has become possible, having been done for over 20 years with safety and precision, delivering quality of life and independence from external help for those who suffer from the problem.

A large part of the population has some “refractive error,” interfering with the sharpness of the images, in general, due to changes in the cornea or the size of the eyes.

Types of Refractive Error


It is the most common, and increasingly present among young people, error in which the person sees only close objects with good definitions while the distant ones are blurred. It occurs when the eyeball is more elongated than normal or because the cornea is more curved. This causes images to be focused in front of the retina, leaving what is far out of focus.


It blurs the close view of objects; the distant view can be clear. It occurs when the eyeball is shortened than normal, or the cornea is more “flattened” or flat.


It’s shading and distortion in the vision, mainly to the extremes, for us to see from very far or very close. It occurs when the cornea has undulations and irregularities, being more curved in some points and flattened in others, creating more than one point of focus for the images.


“Tired eyes” is a natural condition of aging, where we gradually lose the ability to focus on close objects, and it occurs due to the lens of our eyes reducing its elasticity.

How Does Refractive Surgery Work?

Refractive surgery with kraff eye institute for example is performed with the remodeling of the front of our eyes, the cornea, changing its natural curvature through lasers that act directly on its surface and modify its shape and, consequently, the degree of the patient.

The procedure lasts about 5 to 10 minutes in each eye, being done with local anesthesia through anesthetic eye drops. The techniques most used today are LASIK, Smile, and PRK.


LASIK, or Laser In Situ Keratomileusis, is a laser surgery that occurs through the execution of a flap in the cornea. A flap is a flap of the cornea that hangs loose while a small part remains attached. In LASIK surgery, a trained ophthalmologist uses an extremely precise laser beam called an excimer on the inside of the cornea after folding back the flap so that the light is focused properly for most tasks. The designed effect is achieved by molding the anterior surface of the cornea.

LASIK With Femtosecond

For the modern LASIK technique and cross linking surgery, we perform a high-precision femtosecond laser flap. In this way, we eliminate the use of blades to cut the cornea. After making this flap, the excimer laser is applied to correct the refractive error.

Achieve crystal-clear vision with advanced LASIK surgery at Ikonik Eye Centre. Our experienced surgeons use state-of-the-art femto LASIK technology for precise and effective refractive error correction.