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Can LASIK guarantee a 6/6 vision?


No eye surgeons can guarantee a 6/6  vision as the outcome of the LASIK surgery. This is exactly why it is important that you consult with your eye doctor before you make any decision about the LASIK surgery. Your eye doctor should be able to work with you to manage your expectation for the LASIK surgery. Keep in mind that the results may vary based on how much of a correction of your vision is needed.

Although the LASIK surgery may not give you 6/6  vision every time, the effectiveness of LASIK is still pretty impressive. The American Academy of Ophthalmology (AAO) reports that seven out of ten patients achieve 6/6 or better vision. About 95% will achieve 6/12 or better vision. 6/12 is the minimum visual requirement for obtaining a driving license in most countries. It also means reduced dependence on glasses or contact lenses for most daily and sporting activities. This means that for most of the patients that have undergone the LASIK surgery, the LASIK surgery was able to deliver acceptable if not satisfying results that are helpful in their day to day life.

Furthermore; generally, the results of LASIK surgery and the vision correction are permanent. Especially if your refractive error had been stable prior to the surgery, which can be determined by the stability of your eyeglasses or contacts prescription. For the very same reason, you should stop wearing your contact lenses for up to 4 weeks prior to your scheduled baseline evaluation exam as they change the shape of your cornea for up to 4 weeks. For those who wear soft lenses and Rigid Gas Permeable (RGP) lenses, you should stop wearing those contact lenses at least 2 weeks or 3 weeks prior to the scheduled baseline evaluation exam, respectively.

To decrease the risks associated with the surgery, it is always a good idea to conduct a simple self-evaluation before your baseline exam, this will allow you to have a clearer picture of what LASIK is and properly organize your thoughts and questions to discuss with your doctor.

The questions to ask for a self-evaluation are simple:

  1. Have you had a change in your contact lens or glasses prescription in the past year?

(This is called refractive instability, it is best to wait till your refractive error stabilizes.)

  1. Are you below the age of 18?

(The vision of people younger than the age of 18 often fluctuates.)

  1. Are you pregnant or breastfeeding?

(If you are, the fluctuating hormones may have an effect on your vision)

  1. Are you taking medications that may cause vision fluctuations?
  2. Are you taking medications or do you have diseases that may affect the healing of the wound?

If your answer is yes to any of the question above, you may not be a suitable candidate for the LASIK surgery.