One of the most common complications of LASIK surgery is an undercorrection of vision. This amounts to the laser removing too little tissue from the eye. Many surgeons would rather remove too little tissue than too much, which is why undercorrections are so common. In this case, the patient may still need glasses or contacts to correct their vision, though their eyesight will certainly be better than prior to the surgery. In many cases, additional retreatment or enhancement LASIK can be performed to fully correct the patient’s vision.
The opposite of an undercorrection is an overcorrection. This is when the laser takes too much tissue from the eye, resulting in imperfect vision for the patient. In some cases, the treatment will regress spontaneously so that the over-treatment self-corrects. In other cases, it may be necessary to do additional LASIK surgery to reach the desired visual outcome.
Dry Eyes Following Surgery
Immediately following LASIK surgery, it is possible for patients to deal with very dry eyes. The procedure will interfere with tear production in the eye, which creates significant dryness for as long as six months after the surgery. Most patients can handle this dryness through the use of eye drops designed specifically for this purpose.
Difficulty Seeing at Night
Another issue that can arise after LASIK surgery is poor vision at night. Some patients find that they can no longer drive at night or see clearly in low light. This is a result of halos or even double vision that are often only a problem at night. Poor night vision is something that patients must weigh the risks of prior to undergoing LASIK.
Deteriorating Vision Over Time
Finally, prospective patients should be aware that LASIK surgery is not always permanent. In some cases, vision will deteriorate over time to some degree. As the eye ages, the lens loses its flexibility and becomes unable to focus on near objects. Most people between the ages of 40 and 50 begin to need reading glasses. If you have LASIK, this can still happen as you are sacrificing some of your near vision to gain better distance vision.