Who Is NOT a Good Candidate for LASIK?

Who Is NOT a Good Candidate for LASIK?

1. People Younger Than 18 Years

Vision continues to change during adolescence.

If LASIK is performed before the eye’s power stabilizes, the glasses number may continue changing after surgery.

Most surgeons prefer patients who:

• Are at least 18 years old
• Have stable vision for 1–2 years

2. People with Unstable Eye Power

If your spectacle number changes frequently, LASIK may not provide long-lasting results.

Examples include:

• Increasing myopia every year
• Rapidly changing astigmatism
• Fluctuating vision due to diabetes

A stable prescription is one of the most important requirements.

3. Patients with Thin Corneas

LASIK removes a small amount of corneal tissue.

If the cornea is already too thin:

• The eye may become structurally weaker
• Vision quality may suffer
• The risk of corneal complications increases

Modern corneal thickness scans help determine whether LASIK is safe.

4. People with Keratoconus or Weak Corneas

Keratoconus is a condition where the cornea gradually becomes thinner and bulges outward.

LASIK is generally not recommended because it may worsen the condition.

Fortunately, other treatments may be more appropriate, including:

• Corneal collagen cross-linking
• Specialty contact lenses
• Implantable lenses (in selected cases)

Early detection is essential.

5. Patients with Severe Dry Eyes

LASIK may temporarily worsen dry eye symptoms.

If you already experience:

• Burning
• Grittiness
• Frequent eye irritation
• Fluctuating vision

Your doctor may first treat the dryness before deciding whether surgery is suitable.

Sometimes another vision correction procedure may be recommended instead.

6. Pregnant or Breastfeeding Women

Hormonal changes during pregnancy and breastfeeding can temporarily affect:

• Eye power
• Tear production
• Corneal thickness

Because these changes are usually temporary, surgeons often recommend postponing LASIK until vision stabilizes after pregnancy and breastfeeding.

7. Patients with Cataracts

If blurry vision is mainly caused by cataracts, LASIK will not solve the problem.

Instead, cataract surgery may be the more appropriate treatment.

During cataract surgery, the cloudy natural lens is replaced with an artificial intraocular lens (IOL), which can also reduce dependence on glasses.

8. People with Glaucoma (Some Cases)

Having glaucoma does not automatically rule out LASIK.

However, certain patients may not be suitable because:

• Corneal changes can affect future eye pressure measurements.
• Advanced glaucoma requires careful long-term monitoring.
• Vision loss from glaucoma cannot be corrected with LASIK.

Your ophthalmologist will evaluate your individual situation before making a recommendation.

9. Patients with Certain Retinal Diseases

People with conditions such as:

• Retinal tears
• Retinal degeneration
• Diabetic retinopathy
• Macular disorders

may require retinal treatment before considering LASIK.

A detailed retinal examination is an important part of pre-LASIK screening.

10. People with Autoimmune Disorders

Certain autoimmune diseases may slow healing after surgery.

Examples include:

• Rheumatoid arthritis
• Lupus
• Sjögren’s syndrome

LASIK may still be possible for some patients, but only after careful evaluation by an experienced ophthalmologist.

11. Uncontrolled Diabetes

Well-controlled diabetes does not always prevent LASIK.

However, poorly controlled diabetes may increase the risk of:

• Slow healing
• Infection
• Vision fluctuations

Good blood sugar control is important before elective eye surgery.

12. People with Unrealistic Expectations

LASIK improves vision but does not guarantee “perfect” eyesight for every person.

It’s important to understand that:

• Some patients may still need glasses for certain tasks.
• Reading glasses are usually needed with age (presbyopia), even after successful LASIK.
• Individual healing varies.

A realistic understanding of expected outcomes contributes to higher patient satisfaction.

Can You Still Have LASIK If You Wear Thick Glasses?

Not always.

Patients with very high spectacle power may:

• Have insufficient corneal thickness
• Require excessive tissue removal
• Achieve better outcomes with alternative procedures

Advanced diagnostic tests help determine the safest option.

What Tests Decide LASIK Eligibility?

Before recommending LASIK, your ophthalmologist performs a comprehensive eye examination, which may include:

Vision Assessment

Measures your current glasses power and visual acuity.

Corneal Topography

Creates a detailed map of the cornea to detect irregularities such as keratoconus.

Corneal Thickness Measurement (Pachymetry)

Determines whether enough corneal tissue is available for safe treatment.

Tear Film Evaluation

Checks for dry eye disease.

Pupil Size Measurement

Large pupils may influence night vision quality in some individuals.

Retina Examination

Ensures the retina is healthy before surgery.

What Are the Alternatives If You’re Not a LASIK Candidate?

Not qualifying for LASIK does not mean you’re out of options. Depending on your eye condition, your ophthalmologist may recommend:

PRK (Photorefractive Keratectomy)

Suitable for some patients with thinner corneas because no corneal flap is created.

SMILE (Small Incision Lenticule Extraction)

An alternative laser procedure that may be appropriate for selected cases of myopia and astigmatism.

Implantable Collamer Lens (ICL)

A lens is implanted inside the eye without removing the natural lens, making it suitable for some people with high refractive errors.

Glasses or Contact Lenses

Modern lenses continue to provide safe and effective vision correction for many individuals.

The best choice depends on your eye health, prescription, age, and lifestyle.

How Can You Improve Your Chances of Being Eligible?

While some conditions cannot be changed, you can support better eye health by:

• Attending regular eye check-ups.
• Managing diabetes and other medical conditions.
• Treating dry eyes before evaluation.
• Wearing contact lenses as advised before your assessment (your doctor may ask you to stop wearing them for a period before testing).
• Sharing your complete medical and medication history with your eye specialist.

Common Myths About LASIK Eligibility

Myth: Anyone with glasses can undergo LASIK.

Fact: Eligibility depends on several eye health factors, not just your spectacle number.

Myth: Thin corneas always mean no laser surgery.

Fact: Some people with thinner corneas may still qualify for procedures such as PRK instead of LASIK.

Myth: LASIK cures every vision problem.

Fact: LASIK corrects refractive errors. It does not treat cataracts, glaucoma, retinal disease, or age-related reading vision changes.

When Should You Book a LASIK Evaluation?

Consider a professional evaluation if you:

• Are over 18 years old.
• Have had stable vision for at least one year.
• Want to reduce dependence on glasses or contact lenses.
• Have healthy eyes without active infection.
• Understand the benefits and limitations of laser vision correction.

Only a comprehensive eye examination can determine whether LASIK is safe and suitable for you.