LASIK vs PRK vs ICL: Which Vision Correction is Right for You?

If you have been wearing glasses or contact lenses for years, you have probably wondered whether you can ever be free of them. Refractive surgery makes that possible for many people — but LASIK is not the only option, and it is not always the right one. Here is what you need to know before you decide.

What is refractive surgery?

Refractive errors — myopia (short-sightedness), hypermetropia (far-sightedness), and astigmatism — happen when light entering the eye does not focus sharply on the retina. Refractive surgery reshapes the cornea (the clear front of the eye) or adds a lens inside the eye so that light focuses correctly, without needing glasses or contacts.

The three most common procedures are LASIK, PRK, and ICL. Each uses a different approach, and each is suited to a different type of eye.

LASIK — the most popular choice

LASIK (Laser-Assisted In Situ Keratomileusis) is the fastest and most widely performed refractive procedure. The surgeon creates a thin flap in the outer cornea, lifts it, and uses an excimer laser to reshape the underlying tissue. The flap is then replaced and heals naturally.

Best for:

• Healthy eyes with adequate corneal thickness
• Stable prescription for at least a year
• Low to moderate myopia, hypermetropia, and astigmatism
• Patients who want fast recovery and minimal discomfort

What to expect:

The procedure itself takes about 10–15 minutes per eye. Most patients see clearly within 24 hours and return to normal activities within 2–3 days. Mild dryness is common for a few weeks.

PRK — the older but still valuable option

PRK (Photorefractive Keratectomy) was the first laser vision correction procedure and is still used today, especially when LASIK is not suitable. Instead of creating a flap, the surgeon removes the outermost layer of the cornea (the epithelium) and then reshapes the tissue underneath with the same excimer laser used for LASIK. The epithelium grows back over the next few days.

Best for:

• Thin corneas (where a LASIK flap would be risky)
• Active lifestyles where a flap could be dislodged — boxers, military personnel, contact-sport athletes
• Patients with certain corneal surface conditions

What to expect:

Visual recovery is slower than LASIK — most patients see well within one to two weeks, with full stabilisation over a few months. The first few days can be uncomfortable because the surface is healing. Long-term results, however, are equivalent to LASIK.

ICL — the lens-based alternative

ICL (Implantable Collamer Lens) is a completely different approach. Instead of reshaping the cornea, a soft, biocompatible lens is surgically placed inside the eye, behind the iris and in front of the natural lens. It works like a permanent contact lens that you never have to remove or clean.

Best for:

• High myopia (over –8.00D) where LASIK cannot fully correct vision
• Thin or irregular corneas that rule out laser procedures
• Patients with dry eyes that would be worsened by LASIK
• Those who want a reversible procedure (the lens can be removed)

What to expect:

The procedure takes about 15–20 minutes. Vision improves within 24 hours and continues to sharpen over the first week. Because the cornea is not reshaped, ICL preserves the eye's natural optics and is particularly good at handling very high prescriptions.

How do I know which one is right for me?

The honest answer: you do not decide — the eye decides. A proper refractive evaluation involves corneal topography and thickness mapping, a dry eye assessment, pupil size measurement, and a detailed history of your prescription stability. Only after this evaluation can a surgeon tell you which procedure is safe for your particular eyes.

Someone with a –3.00D prescription, stable glasses, and healthy corneas is likely an excellent LASIK candidate. Someone with a –10.00D prescription and thin corneas may be far better suited to ICL. A young patient with borderline corneal thickness may be safer with PRK. All three procedures have very high success rates when performed on the right eyes.

A few things to be realistic about

No refractive surgery guarantees you will never need glasses again. Most people achieve 20/20 or better vision afterwards, but reading glasses may still be needed after the age of 40 as presbyopia sets in (this is a separate issue, unrelated to whether the surgery 'worked'). Some patients experience temporary glare, halos around lights, or dryness during healing.

A good surgeon will tell you if you are not a good candidate. If anyone is willing to operate on you without a detailed pre-operative workup, or dismisses your questions about risks, get a second opinion.

Book an evaluation

If you are considering refractive surgery, the first step is a thorough consultation and corneal scan. We will explain what your eyes can safely undergo, answer every question honestly, and if you are a candidate, guide you through the entire process. Call our appointment line or book online to schedule your evaluation.