Who is Suitable for Laser Vision Surgery?

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Video Transcript

Who is suitable for laser vision correction — LASIK or PRK?
Hi, I’m Dr Rylan Hayes — ophthalmologist at The Vision Surgeon in Maroochydore on the Sunshine Coast. I’m going to be direct: not everyone is a suitable candidate for laser vision correction. And the only way to know whether you are is through detailed scans of your eyes at a free eligibility screening. That said, here’s the general picture. Ideal candidates are adults with stable prescriptions — That said, here’s the general picture. Ideal candidates are adults with stable prescriptions — your prescription should have been highly consistent for at least 12 months, ideally longer. There are prescription range limits — very high myopia, hyperopia, or astigmatism may exceed what laser can safely correct. Corneal thickness and health are critical. Patients with corneal irregularities, very thin corneas, or conditions like keratoconus are typically not suitable — and those conditions may only be detected through proper corneal scanning. Dry eye, general health conditions, and certain medications can also affect candidacy on a case-by-case basis. And importantly — age matters. Laser vision correction is typically performed in adults over 18 onward, when the prescription has stabilised. However, once you reach a certain point in middle age, lens-based procedures may be more appropriate to help restore or maintain near vision at the same time. Come to our free eligibility screening. That’s where the real answers are.

Who is Suitable for Laser Vision Surgery (LASIK or PRK)?

Laser vision correction is not suitable for everyone — and determining your individual eligibility requires a detailed clinical assessment, not a simple checklist. Here’s an overview of the key factors that influence suitability for LASIK or PRK.

Age

Laser vision correction is typically performed for adults over 18 once their refractive prescription has fully stabilized. There is no firm upper age limit, though patients over 40 need to consider the impact of presbyopia (loss of near focus) on their post-operative vision expectations — monovision or lens surgery may be discussed as part of the planning.

Stable prescription

Your glasses or contact lens prescription should have been stable for at least 12 months — ideally longer. A changing prescription suggests the eye’s shape is still evolving, which makes the outcome of laser vision correction less predictable.

Prescription range

Laser vision correction can address myopia (short-sightedness), hyperopia (long-sightedness), and astigmatism within certain ranges. Very high prescriptions may be outside the range of what can be safely treated with laser. In those cases, lens-based alternatives (such as implantable contact lenses (ICLs) or refractive lens exchange (RLE)) may be more appropriate.

Corneal thickness and health

Laser vision correction reshapes the corneal surface — which requires sufficient corneal tissue. Corneas that are too thin, irregularly shaped, or affected by conditions such as keratoconus are generally not suitable for laser treatment. These conditions are detected through pre-operative corneal topography and pachymetry, which are performed at your eligibility screening.

Dry eye

Significant pre-existing dry eye can worsen after LASIK and affect recovery and visual quality. An assessment of tear film health is part of the eligibility process. In some cases, dry eye is addressed before proceeding with surgery; in others, PRK — which preserves more corneal nerves — may be preferred.

General health and medications

Certain systemic conditions (e.g. autoimmune disease, uncontrolled diabetes) and medications (e.g. isotretinoin) can affect corneal healing and may be a contraindication or require further discussion.

Pregnancy and breastfeeding

Laser vision correction is not performed during pregnancy or breastfeeding, as hormonal changes can affect refraction and corneal healing.

LASIK vs PRK candidacy

Both LASIK and PRK can correct a similar range of prescriptions. PRK is preferred in patients with thinner corneas (as no flap is created), in certain high-contact activities where flap displacement is a risk, or where corneal anatomy is not ideal for flap creation. The eligibility screening determines which procedure — if either — is appropriate.

Key Takeaways

• Suitable candidates for laser vision surgery have stable prescriptions, adequate corneal thickness, healthy corneas, and no significant contraindications
• Corneal scanning is essential — conditions like keratoconus can only be identified with proper pre-operative assessment
• LASIK and PRK are appropriate for different patient profiles — the eligibility screening determines which is right for you
• A free eligibility screening at The Vision Surgeon is the starting point for all laser vision candidates

Find out if laser vision correction is right for you.

Book your free eligibility screening with Dr Rylan Hayes at The Vision Surgeon, Maroochydore.

References

• American Academy of Ophthalmology. Refractive Errors & Refractive Surgery — Preferred Practice Pattern. aao.org
• Randleman JB, et al. Risk factors and prognosis for corneal ectasia after LASIK. Ophthalmology. 2003.