Vision Correction for Nearsightedness (Myopia)

Myopia is the most common refractive error in the world. Approximately 30% of the global population is myopic — unable to see clearly at a distance while near vision remains normal. In the United States alone, myopia affects more than 40% of the adult population, and global prevalence has risen sharply over the past three decades.

Vision correction surgery for myopia is among the most thoroughly studied and consistently successful procedures in all of medicine. This guide explains which procedures treat myopia, which is best suited to different severity levels, and what you can realistically expect from each. It is part of the broader Vision Correction Procedures Compared hub.

Understanding Myopia

Myopia occurs when the eye is too long relative to its focusing power, or when the cornea is too curved. Either condition causes light to focus in front of the retina rather than on it, producing the characteristic blurred distance vision of nearsightedness.

Myopia is measured in diopters (D), with a negative value indicating the degree of correction required. Classifications commonly used in clinical practice:

Low myopia: -0.50D to -3.00D
Moderate myopia: -3.00D to -6.00D
High myopia: -6.00D to -10.00D
Very high (severe) myopia: above -10.00D

Myopia typically stabilizes in the mid-to-late 20s, though some patients — particularly those with high prescriptions — continue to progress into their 30s. Prescription stability is a prerequisite for most vision correction surgeries.

Option 1: LASIK

LASIK is the most widely chosen treatment for myopia globally. It is effective, fast, and appropriate for the vast majority of myopic patients who meet anatomical candidacy criteria.

How it works: A femtosecond laser creates a thin corneal flap. An excimer laser removes precise amounts of corneal tissue beneath the flap, flattening the corneal curvature so light focuses correctly on the retina. The flap is repositioned and bonds without sutures.

Effective range: Up to approximately -10.00D myopia (platform-specific; some surgeons treat up to -12.00D in select cases).

Best for:

Low to moderate myopia with adequate corneal thickness
Patients wanting the fastest recovery
Patients without significant dry eye disease

Outcome data: 96–98% of myopic LASIK patients achieve 20/20 or better. Satisfaction rates consistently exceed 95% in large-scale studies.

Limitations: Not appropriate when corneas are too thin for safe ablation. Carries a risk of post-LASIK dry eye due to corneal nerve disruption. The corneal flap introduces a small but non-zero risk of flap-related complications.

Option 2: PRK

PRK treats myopia via the same excimer laser mechanism as LASIK but without creating a flap. The epithelial surface is temporarily removed, the laser reshapes the underlying stroma, and a bandage contact lens covers the surface while the epithelium regenerates.

Effective range: Equivalent to LASIK — up to approximately -10.00D to -12.00D in appropriate corneas.

Best for:

Myopic patients with thin corneas who are borderline for LASIK flap creation
Patients who participate in contact sports or have occupational flap-disruption risk
Military and law enforcement personnel where regulations favor surface ablation
Patients with mild surface irregularities

Outcome data: Equivalent to LASIK at 12 months and beyond. Short-term acuity during the healing phase (weeks 1–6) is lower than LASIK. Full outcomes converge by 3–6 months.

Limitations: Longer recovery. Three to five days of moderate discomfort and blurred vision while the epithelium heals. Optimal acuity may take six to twelve weeks. Haze formation (subepithelial haze) can occasionally occur at high corrections; mitomycin-C (MMC) application during surgery significantly reduces this risk.

Option 3: SMILE

SMILE (Small Incision Lenticule Extraction) is the most recent major advance in laser refractive surgery for myopia. Using a single femtosecond laser, a disc-shaped piece of corneal tissue (the lenticule) is created inside the intact cornea and extracted through a 2–4mm incision, changing the corneal curvature without a flap.

Effective range: FDA-approved up to -10.00D with up to -3.00D astigmatism.

Best for:

Myopic patients within the approved range who are concerned about dry eye
Patients in contact sports or military who want flapless surgery
Patients with high myopia wanting a flapless alternative

Outcome data: Comparable to LASIK in the 1–3 year range. Multiple randomized trials show equivalent uncorrected visual acuity outcomes.

Advantages for myopia specifically: Fewer corneal nerves are disrupted than in LASIK, resulting in significantly lower rates and severity of post-surgical dry eye — a meaningful advantage for high myopes where large ablations disrupt more nerve tissue.

Limitations: Does not treat hyperopia. Narrower astigmatism range than LASIK. Not available at all practices.

Option 4: EVO ICL

The EVO ICL is the preferred procedure for high and very high myopia — prescriptions too large to treat safely with laser corneal reshaping.

How it works: A foldable Collamer lens is implanted through a 2.8mm micro-incision behind the iris and in front of the natural crystalline lens. It corrects myopia by adding a corrective optical element inside the eye rather than altering the corneal shape.

Effective range: -3.00D to -20.00D myopia, with or without concurrent astigmatism (toric EVO ICL, up to -6.00D).

Best for:

High myopia above -8.00D to -10.00D where laser surgery would require removing excessive corneal tissue
Thin corneas that disqualify patients from laser surgery
Patients with dry eye disease
Patients who value reversibility

Outcome data: 96–99% of EVO ICL patients achieve 20/20 or better. Patient satisfaction rates of 97–99% in large clinical studies consistently exceed LASIK satisfaction rates. Multiple studies report that EVO ICL patients describe sharper, cleaner vision — particularly at night — compared to equivalent laser corrections.

Why EVO ICL beats laser for high myopia: At high corrections, laser procedures remove a substantial fraction of corneal thickness, increasing the risk of ectasia (progressive corneal weakening) and producing lower-quality optics due to the large treatment zone required. EVO ICL adds a corrective lens without altering the cornea at all, preserving optical quality and structural integrity.

Explore our EVO ICL Awards to find recognized specialists in phakic IOL implantation.

Choosing Based on Myopia Severity

What Happens If You Have Both Myopia and Astigmatism?

Most people with myopia have concurrent astigmatism to some degree. All major vision correction procedures treat combined myopia and astigmatism:

LASIK/PRK: Cylindrical correction added to the ablation profile. Treats up to -5.00D of astigmatism concurrently.
SMILE: FDA-approved for concurrent astigmatism up to -3.00D.
Toric EVO ICL: Specifically designed for combined myopia and astigmatism — treats up to -6.00D of astigmatism simultaneously.

See Vision Correction for Astigmatism for a full treatment review.

Myopia and Long-Term Eye Health

Patients with high myopia should be aware that the physical changes to eye length (axial elongation) that produce high myopia carry independent health implications beyond refractive error:

Increased lifetime risk of retinal detachment
Higher risk of glaucoma
Greater prevalence of macular degeneration in very high myopes

Vision correction surgery corrects the refractive error but does not shorten the eye or reverse the structural changes. Patients with high myopia should continue regular dilated retinal examinations after refractive surgery, regardless of the excellent visual outcomes achieved.

Related Resources

*This content is educational and does not constitute medical advice. All surgical decisions should be based on a comprehensive pre-operative evaluation by a qualified ophthalmologist.*