Am I eligible for laser eye surgery?

Laser eye surgery can be a life-changing way to reduce or eliminate dependence on glasses and contact lenses. It reshapes the cornea — the clear front window of the eye — to correct short-sightedness, long-sightedness and astigmatism. But it is not suitable for everyone. Here is how eligibility is assessed.

The short answer

You may be eligible for laser eye surgery if you are over 18, have had a stable glasses prescription for at least one to two years, have healthy corneas of adequate thickness, and have no uncontrolled eye or general health conditions. A full consultant-led assessment is essential to confirm this.

Typical candidates

Laser eye surgery is most often recommended for patients who:

- Are aged 18 to 60 with a stable prescription

- Have short-sightedness, long-sightedness or astigmatism within a treatable range

- Have corneas that are thick enough and healthy enough for safe reshaping

- Are not pregnant or breastfeeding at the time of treatment

- Want to reduce dependence on glasses or contact lenses for work, sport or daily life

What is checked during assessment

A consultant-led suitability assessment includes:

1. **Refraction and prescription stability.** Your glasses prescription and unaided vision are measured, and we confirm it has been stable for at least one to two years.

2. **Corneal thickness and mapping.** Devices such as Pentacam or Oculus create a detailed map of corneal shape and thickness. This rules out conditions like keratoconus and confirms enough tissue is present for safe treatment.

3. **Pupil size and tear-film testing.** Large pupils and dry eye can influence night-vision comfort and recovery, so these are assessed carefully.

4. **Dilated eye examination.** The retina, lens and optic nerve are checked to rule out any hidden eye disease that could affect the result or safety of surgery.

5. **General health review.** Conditions such as diabetes, autoimmune disease, or certain medications can affect healing and may change eligibility.

Who may not be suitable

Laser eye surgery is generally not recommended if you:

- Are under 18, or your prescription is still changing significantly

- Have very thin corneas, keratoconus or significant corneal scarring

- Have severe or uncontrolled dry eye disease

- Have active eye infection, inflammation, or uncontrolled glaucoma

- Are pregnant or breastfeeding, as hormone changes can affect the prescription and healing

- Have unrealistic expectations about the outcome — laser corrects your current prescription, but it does not stop the eye from ageing naturally

Procedure choice depends on your eyes

Even if you are suitable for laser, the exact technique depends on your corneal thickness, prescription, lifestyle and tolerance for visual trade-offs. LASIK, LASEK/PRK and SMILE each suit different eyes. The surgeon will recommend the option that gives the safest, most predictable outcome for your individual anatomy.

The bottom line

Eligibility for laser eye surgery is decided on a case-by-case basis after a detailed diagnostic assessment. Age, prescription stability, corneal health and lifestyle all play a part. The most important step is to have a thorough consultant-led assessment so the right procedure — or the right alternative — is recommended for your eyes.

Book a consultation

Ms Tahmina Pearsall offers consultant-led laser eye surgery assessments across 17 UK locations. Contact your nearest clinic to arrange a full eligibility check and discuss which laser option may be right for you.