What is Lasik eye surgery?

What is Lasik eye surgery?

LASIK stands for Laser-Assisted In Situ Keratomileusis.

LASIK eye surgery is used to correct the vision as it reduces the need for eyeglasses and contact lenses to correct the most common vision problems (e.g., nearsightedness, farsightedness, astigmatism).

The procedure relies on the expertise of a surgeon who’s trained in the ophthalmic surgery.

Lasik eye surgery

During the LASIK eye surgery, an ophthalmic surgeon first creates a corneal flap using microkeratome (A microkeratome is a precision surgical instrument with an oscillating blade designed for creating the corneal flap in LASIK or ALK surgery.)

The surgeon then pulls back the flap to expose the underlying corneal tissue, and then the excimer laser ablates (reshapes) the cornea in a unique pre-specified pattern for each patient, which corrects the refractive error. The flap is then gently repositioned onto the underlying cornea without sutures.

Watch this 3D animation on LASIK surgery by AmerraMedical

LASIK surgery is not for everyone. People with severe dry eyes, certain corneal diseases, and other select eye conditions should not undergo LASIK eye surgery.


What is refractive error?

In the human eye, the front surface (cornea) and lens inside the eye form the eye’s “focusing system”.

They are primarily responsible for focusing incoming light rays onto the surface of the retina.

In a perfect system, the power of the cornea and lens are perfectly matched with the length of the eye and images are in focus; any mismatch in this system is called a refractive error, and the result is a blurred image.



What are the primary types of refractive error?

•          Myopia (nearsightedness).

•          Hyperopia (farsightedness).

•          Astigmatism: In people with astigmatism, either the corneal or lens shape is distorted, causing multiple images on the retina. This causes objects at all distances to appear blurry. Many people have a combination of either myopia or hyperopia with astigmatism.


How do glasses or contacts improve vision in people with refractive errors?

Glasses or contact lenses are used to compensate for the eye’s refractive error by bending light rays in a way that complements the eye’s specific refractive error.

In short, LASIK and other forms of refractive surgery correct the eye’s refractive error to reduce the need for other visual aids.


This article is intended for education purpose. If you want professional consultation please visit an ophthalmologist who will examine your eyes.



  • Sirisha

    Great Informative Article. Thanks for sharing such a useful article for us. It may useful for everyone. I am also interested share some useful information about benefits and limitations of Lasik Eye Surgery http://zoylodigihealth.blogspot.in/2016/11/lasik-surgery-a-painless-way-to-get-rid-of-eye-glasses-and-contact-lenses.html .

  • isky 4000

    Lasik eye surgery will give you freedom from contact lenses and glasses and make you more aware of how they interfered with your everyday life. Making the choice to have Lasik eye surgery will vastly improve you life. It is proven on me. Lasik changes my whole life. And I never regret take this decision. For better vision you can do lasik at http://www.ooglaserkliniekheuvelrug.nl ; maybe one of you can be the next candidate.

  • http://www.drniteshbansal.com Dr.Nitesh Bansal

    he is the best eye doctor in jaipur and he is giving best eye services in SDHM as well as PInk City Eye Center http://www.drniteshbansal.com

  • kennis

    with lasik surgery can fix eye problem quickly, so many people like doing that procedure to have healthy eye. So, you will free from eyeglass forever floaterlaser.nl

  • Akash Walunj

    The blog is really great, thanks for sharing.

  • vallerie

    Thankyou for sharing about lasik eye surgery, this is so nice information. With this information i have know about lasik eye surgery. With doing lasik eye surgery can fix your eye problem. laatjeogenlaseren.nl

  • Rahil Chaudhary

    This is really interesting and fantastic to read and i must appreciate you for sharing this post with all of us.
    Please visit – https://www.planmylasik.com/

  • Frey

    very interesting article, information about lasik eye surgery that can turn eyes into normal again into a very helpful experience. floaterlaser.co.uk