LASIK or laser in-situ keratomileusis refers to the eye surgery performed to improve vision those suffer from astigmatism or are nearsightedness, farsightedness and reduce the dependency on glasses or contact lenses. The cornea is changed permanently and reshaped through the quick, safe, and comfortable process. The laser vision correction procedure may be the only surgery that the patient does not feel any pain during and even after it.
It can be performed on one or both eyes at the same time. The patient will be awake during the procedure although one can use some medicines to relax. A few drops of anesthetic are used to numb the eyes. The eyes should keep open. So, an eyelid holder is used as well as a suction ring for lifting and flattening the cornea. The pressure from the eyelid holder and suction ring may be felt. After Lasik, the patient does not feel pain and there is no need to use any long-term treatment just the eye drops for removing the dryness of the eye surface.
There are some qualities to perform Lasik, including:
- The patient should be at the age of 18
- The patient’s eye score should not have changed in the past year or at least a change of more than 25% to 0.5
- The cornea should also be thick enough, although it is different for the patients; the thickness of cornea is 1-6 for farsightedness, 1 to 10 diopters for nearsightedness, and for those with astigmatism is 0.5 to 6
- The absence of eye diseases such as: Cataracts, Glaucoma, Dry eye syndrome and so on
- Some physical illnesses such as Rheumatism, Immunodeficiency and progressed diabetes should prevent Lasik
In general, Lasik is not recommended for those who are over 40 years old, those with aging eyes and pregnant and lactating women.
Lasik provides many advantages for the patients, including:
- There is no pain or the patient may feel very little pain during the surgery and even after it
- Vision is corrected immediately the day after the surgery
- It can be made again after some years to improve the vision more
- There is no need to use eyeglass or contact lens after Lasik
Similar to the other kinds of surgeries, lasik also may include some disadvantages, such as:
- Reduced corneal strength and corneal thinning
- The dryness of the eye surface
- The risk of cataract
- Eye sensitivity to light
- Seeing halos mostly at night
- Corneal infection