{"id":1957,"date":"2026-10-20T08:54:24","date_gmt":"2026-10-20T08:54:24","guid":{"rendered":"https:\/\/laseristanbulclinic.com\/eye-health\/laser-eye-surgery\/can-you-have-laser-eye-surgery-twice\/"},"modified":"2026-10-20T12:59:12","modified_gmt":"2026-10-20T12:59:12","slug":"can-you-have-laser-eye-surgery-twice","status":"publish","type":"page","link":"https:\/\/laseristanbulclinic.com\/en\/eye-health\/laser-eye-surgery\/can-you-have-laser-eye-surgery-twice\/","title":{"rendered":"Can You Have Laser Eye Surgery Twice? Enhancements, Limits and Alternatives"},"content":{"rendered":"\n
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  4. Can You Have Laser Eye Surgery Twice? Enhancements, Limits and Alternatives<\/span><\/li><\/ol><\/div>\t\t\t

    Can You Have Laser Eye Surgery Twice? Enhancements, Limits and Alternatives<\/h1>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t
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    \"Excimer<\/figure>\n\t\t\t\t\t\t\t\t\t

    Yes, often. If your vision drifts or a small prescription is left after LASIK, SMILE or PRK, a second laser treatment, called an enhancement or touch-up, can fine-tune it once your prescription has been stable for about three months. It is a surgeon’s decision based on corneal thickness, shape and stability, and it is not possible for everyone. Laser surgery at Laser Istanbul Clinic is led by Prof. Dr. Ahmet Sat\u0131c\u0131 and Op. Dr. Aysan Bayram.<\/p><\/div>\n\t\t\t\t\t<\/div>\n\t<\/div><\/div>\n<\/section>\n\n\n\n\n

    Can you have laser eye surgery twice?<\/h2><\/div>

    Yes, in many cases you can have laser eye surgery twice on the same eye, but only if your surgeon confirms that your cornea can safely take it. The second operation is normally called an enhancement<\/strong>, a touch-up<\/strong> or a retreatment<\/strong>. It is a smaller, targeted procedure that corrects what is left of your prescription, not a full repeat of the first one.<\/p>\n

    The American Academy of Ophthalmology (AAO) says that vision which is under- or over-corrected after LASIK can often be improved with glasses, contact lenses or additional laser surgery. The US Food and Drug Administration (FDA) adds an honest warning: you may need additional treatment, and additional treatment may not be possible. The NHS lists needing a second operation to fine-tune your focus among the possible complications of laser eye surgery.<\/p>\n

    So the real question is not “is it allowed?” but “can your cornea take it?” Three things decide that:<\/p>\n

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    1. Stability.<\/strong> Your prescription must have stopped changing.<\/li>\n
    2. Thickness.<\/strong> Enough healthy corneal tissue must be left after the first treatment.<\/li>\n
    3. Shape.<\/strong> The cornea must still be regular and strong, with no sign of weakening.<\/li>\n<\/ol>\n

      The rest of this guide explains each of them, how often a second treatment is needed, how it differs after LASIK, SMILE and PRK, and what you can do if laser is no longer an option.<\/p><\/div><\/div><\/div><\/div><\/div><\/section>\n\n\n\n\n

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      Why would you need a second laser treatment?<\/h2>\n\t\t\t

      Most people who have a second treatment do so for one of four reasons.<\/p>\n\t\t\t

      Reason<\/th>What it means<\/th>Can a second laser help?<\/th><\/tr><\/thead>
      Undercorrection<\/th>Some short-sightedness, long-sightedness or astigmatism is left after healing<\/td>Often yes, once the prescription is stable<\/td><\/tr>
      Overcorrection<\/th>The correction went slightly past zero, for example a short-sighted eye became mildly long-sighted<\/td>Sometimes; it depends on how the eye is healing and how much tissue is left<\/td><\/tr>
      Regression<\/th>Your prescription slowly drifts back over months or years<\/td>Often yes, if the cornea is still thick and stable enough<\/td><\/tr>
      Optical irregularities<\/th>Halos, glare or ghosting caused by a slightly uneven treatment<\/td>Sometimes; this needs detailed corneal mapping first<\/td><\/tr><\/tbody><\/table><\/div>

      Regression is real but usually slow. EyeWiki, the AAO’s clinical encyclopedia, reports myopic regression after LASIK of about 0.12 dioptres a year for myopia up to \u221210 D, and about 0.25 dioptres a year for higher myopia. It names higher starting prescriptions, younger age and a thinner remaining corneal bed among the risk factors.<\/p>\n

      Reading glasses are not a reason for a second laser.<\/strong> Presbyopia, the age-related loss of close-up focus, is a change in the eye’s natural lens, not in the cornea. The AAO states that LASIK cannot correct it and that almost everyone with excellent distance vision will need reading glasses after about age 40. If your reading vision is what has changed, repeating the laser will not fix it, and other options are discussed later in this guide.<\/p><\/div>\t<\/div><\/div><\/div><\/section>\n\n\n\n\n

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      How often do people need laser eye surgery a second time?<\/h2>\n\t\t\t

      A minority of patients need a second treatment, and the rate depends on the procedure, the size of the original prescription and the technology used. The published figures vary widely, so read them as ranges, not promises.<\/p>\n\t\t\t

      Procedure<\/th>How often a second treatment is needed<\/th>Source and context<\/th><\/tr><\/thead>
      LASIK<\/th>0.38% to 16% of short-sighted patients in the studies reviewed<\/td>A 2022 comparison of LASIK, Trans-PRK and SMILE, citing earlier studies; the authors note that retreatment rates have fallen as technology and surgeon experience improved<\/td><\/tr>
      LASIK (older data)<\/th>10.5% within one year<\/td>A 2003 study of 2,485 eyes (Hersh et al.). Most retreatments were done within 12 months, and 3 eyes needed two. It used older technology, so treat it as a rough guide<\/td><\/tr>
      PRK (surface laser)<\/th>3.8% to 20.8% with conventional PRK<\/td>The same 2022 review; a higher range than for LASIK<\/td><\/tr>
      SMILE<\/th>About 2% to 4%<\/td>2.7% of 524 eyes (Liu et al. 2017); 2.3% of 2,803 eyes and 4.4% of 2,643 eyes in two other series cited by a 2019 review<\/td><\/tr><\/tbody><\/table><\/div>

      These numbers come from different groups of patients with different corrections, so they do not prove that one method is “better” than another. What they do show is that a second treatment is the exception, and that it is more likely in some people than in others.<\/p>

      Who is more likely to need one?<\/h3>