Presbyopia surgery may be considered after LASIK or PRK, depending on your current eye condition. Unlike an eye that has never had surgery, an eye that has already been treated requires assessment of the altered corneal structure and remaining tissue. It is also necessary to check whether presbyopia is the cause of your current vision difficulties.
If you had LASIK in 2006 and now struggle with nearby text in your 50s, the current vision difficulty should be assessed to determine whether it is related to the previous surgery or age-related presbyopia. If blurred vision or glare and halos while driving at night have also developed, those symptoms should not all be attributed to presbyopia.
Why can presbyopia develop after LASIK or PRK?
LASIK and PRK change the cornea's refractive power to correct conditions such as myopia and astigmatism. Presbyopia is an age-related loss of flexibility and focusing ability in the natural lens inside the eye. Because the part of the eye involved and the cause of the change differ, presbyopia can develop even after vision correction surgery.
If distance vision has remained good for many years after surgery but nearby text becomes difficult to focus on, the examination considers whether near-vision correction is needed for presbyopia. This does not automatically mean the previous LASIK has stopped working.
If distance vision has also become blurry, other factors need to be checked, including a change in prescription, the ocular surface, and the natural lens. Presbyopia after LASIK and reduced vision after LASIK can share some symptoms, but they are not the same thing. The cause of the current vision change needs to be identified before considering additional surgery.
What needs checking before presbyopia surgery in a previously treated eye?
First, the examination checks the current corneal shape and visual condition. LASIK creates a flap and treats the underlying stroma, while PRK treats the stroma through the corneal surface. Even if the cornea is currently thick enough, suitability for further surgery can differ depending on the previous procedure and amount of correction.
The examination considers the previous surgical method and amount of correction, current corneal thickness and shape, and how much additional correction is needed. It is necessary to reassess whether the cornea is suitable for further correction. Even many years after the initial procedure, suitability depends on the cornea's current condition.
Second, the examination checks current corneal shape and vision. This includes the shape and irregularity of the front and back corneal surfaces, the current prescription, corrected vision, and prescription stability. If the tear film or dry eye affects vision or measurements, the ocular surface is also addressed.
Third, the examination assesses the natural lens. The treatment approach can differ depending on whether there is presbyopia alone or whether cataracts are also developing. If cataracts are the main cause of reduced vision, treatment of the lens, such as cataract surgery, may take priority over presbyopia LASIK.
Preoperative prescription measurements, corneal thickness, corneal topography, and surgical records help compare the previous correction with the current condition. An examination can begin even without those records, with corneal imaging and other tests used to assess the information needed.
What options for presbyopia correction may be considered after LASIK or PRK?
Reading glasses or progressive glasses can help with presbyopia. If you want to reduce your reliance on glasses for convenience or cosmetic reasons, presbyopia LASIK may be considered.
Laser approaches include monovision, which targets near vision in one eye, and methods such as PresbyMAX. In eyes previously treated with LASIK or PRK, the current corneal condition and previous amount of correction help determine the method and extent of further treatment.
PresbyMAX creates a corneal profile designed to support near and distance vision to help with the near-vision difficulty caused by presbyopia. EYEREUM Eye Clinic uses an approach that targets distance vision in the dominant eye and creates a multifocal corneal profile with PresbyMAX in the non-dominant eye. Conventional monovision focuses on setting different refractive targets for the two eyes. PresbyMAX also designs the shape of the cornea in the eye assigned to near vision, aiming to broaden the range of clear vision.
Whether this principle can be applied must be reassessed in the current cornea after previous LASIK or PRK. An eye that still sees well at a distance may require a different amount of correction from one in which myopia or astigmatism has returned. The tissue available for additional correction is also limited. A previously treated eye may therefore need a different plan from an eye having surgery for the first time.
When the two eyes are assigned different refractive targets, adaptation and visual quality are also considered. Monovision can cause difficulties with depth perception or nighttime vision for some people, so a contact lens trial may be used to assess adaptation beforehand. However, whether existing glare or halos are caused by presbyopia or by another condition requires a separate assessment.
If cataracts are confirmed and lens clouding affects everyday life, lens surgery is considered. Previous LASIK or PRK does not automatically rule out cataract surgery, but intraocular lens power calculations must account for the previous corneal correction. Whether to treat the cornea again or address the natural lens depends on the cause of the current reduction in vision.
Do blurred vision, glare, or halos affect the choice of presbyopia surgery?
Presbyopia LASIK may help near vision, but whether it also addresses existing blurred vision, glare, or halos depends on their cause. In particular, glare and halos at night can occur even when vision is good on an eye chart. Daytime visual acuity alone cannot fully explain nighttime visual difficulties.
Cataracts can cause blurred vision, glare, and difficulty seeing at night. A corneal laser cannot remove this clouding of the lens. If tear-film problems make vision fluctuate, the examination checks whether symptoms and measurements improve after ocular surface treatment. If corneal irregularity contributes, suitable correction options are evaluated separately.
If subtle corneal irregularities remain after the previous procedure, changing near focus alone may not sufficiently improve the resulting visual difficulties. At EYEREUM Eye Clinic, the front and back corneal surfaces and higher-order aberrations are analyzed, with CustomEyes used to correct corneal irregularities when needed. Higher-order aberrations are optical distortions that ordinary glasses prescriptions cannot fully correct. This additional treatment is considered only after confirming that the remaining corneal tissue and current corneal shape are suitable.
Suitability for presbyopia LASIK therefore depends on evaluating both near vision and the causes of blurred vision, glare, and halos. Presbyopia surgery may be considered after LASIK depending on the current eye condition. If blurred vision, glare, or halos are also present, causes other than presbyopia need to be checked first.
EYEREUM Eye Clinic considers presbyopia, myopia, astigmatism, and the condition of the cornea and natural lens together when planning treatment. For previously treated eyes, the plan reflects both the surgical history and current examination findings.
