Refractive and laser eye surgery corrects vision problems, making living without glasses or contact lenses a possibility for many people. While this kind of surgery has been performed for years, advancements in technology mean that LASIK and other vision correction procedure outcomes are constantly improving.
Vision Problems and Range of Correction
When we look at something, the cornea of the eye focuses, or refracts, the light coming into the eye onto the retina. In a normal eye, one that does not require correction, the light rays come to a sharp point on the retina. If the cornea is misshapen or has an irregular curvature, the light going to the retina does not meet the retina properly, therefore objects appear blurry.
The result of the cornea failing to focus light correctly on the retina is a refractive error, which shows up as one or more of three vision problems:
- Myopia, or nearsightedness, causes close objects to be seen clearly, but objects farther away to appear blurred.
- Hyperopia, or farsightedness, causes distant objects to be seen clearly, but close up objects appear blurry.
- Astigmatism describes irregularities in the shape or the cornea, which causes blurriness at any distance.
LASIK (Laser-Assisted in Situ Keratomileusis) eye surgery corrects imperfections in the shape of the cornea. Many people who wear corrective lenses have one or all of the above-mentioned vision problems. By increasing the eye’s ability to focus, LASIK surgery does away with the need for glasses or contacts for most patients.
LASIK surgery is a very short process, taking roughly 15 minutes in total. Numbing eye drops are administered to eliminate any pain and discomfort during the procedure. LASIK is a two-step process. First the surgeon uses an instrument called a microkeratome or femtosecond laser to create a flat. Once the flap is created and lifted the surgeon used a specialized laser to reshape the cornea. Once the cornea is reshaped the flap is replaced and the LASIK surgery is complete. Patients will immediately notice an improvement in vision, however vision will be slightly blurry, as if looking through a foggy windshield.
With most LASIK procedures, recovery times are relatively quick, allowing patients to return to many normal activities the same or next day. Some mild discomfort can occur right after the procedure, but patients are advised to go home and nap for a few hours to help the eyes begin to heal. Itching and burning commonly occur, but medicated drops are provided to help patients avoid rubbing their eyes and ease any discomfort. A day after the procedure, the patient must return to Icon to check on vision and ensure healing has begun. Within a few days, the discomfort, along with any light sensitivity, should dissipate. Avoiding certain things such as contact sports, swimming, and hot tubs the first week help improve the recovery process ensure successful results. For the first few months post-surgery, vision may fluctuate in situations such as night driving.
See more information on our LASIK procedure and commonly-asked LASIK questions.