LASIK can reduce or remove the need for glasses or contact lenses, but it involves surgery and carries risks such as dry eyes, glare, halos, and, rarely, lasting vision problems. Glasses have no surgical risk and are easy to stop using; contacts avoid surgery but can cause irritation or serious infection if misused. The best choice depends on your eye health, daily needs, tolerance for risk, and budget.
How do the risks of LASIK, glasses, and contacts compare?
LASIK is a surgical procedure that uses a laser to reshape the clear front surface of the eye, called the cornea, so that light focuses more accurately on the retina. According to the American Academy of Ophthalmology, the procedure can correct nearsightedness, farsightedness, and astigmatism. Glasses and contact lenses correct these focusing problems without permanently reshaping the cornea.
All three options can help you see clearly, but their risks are different. Glasses generally have the lowest medical risk. Contact lenses avoid surgery but require careful handling and cleaning. LASIK may offer greater freedom from corrective lenses, but it introduces surgical risks that cannot be completely eliminated.
| Factor | LASIK | Glasses | Contact lenses |
|---|---|---|---|
| Medical risk | Surgical complications and possible lasting visual changes | Very low risk to eye health during normal use | Irritation, corneal scratches, and potentially serious infections |
| Dry eyes | May develop or worsen after surgery | Does not directly cause dry eye | May cause or worsen dryness and discomfort |
| Night vision | Glare, halos, or reduced vision in dim light may occur | Usually provides predictable correction when the prescription is suitable | Can provide clear vision, although lens-related discomfort may affect wear |
| Ongoing care | Requires surgical recovery and follow-up visits | Cleaning, maintenance, and prescription updates | Cleaning or replacement as directed, plus regular eye care |
| Future vision changes | May still require glasses as vision changes with age | Prescription can be updated when needed | Prescription can be updated when needed |
| Cost pattern | Higher upfront procedure cost | Replacement costs over time | Recurring costs for lenses, solutions, and replacement supplies |
No option guarantees perfect vision in every situation. The key difference is that glasses and contacts can be changed or discontinued, while LASIK permanently alters corneal tissue. The possible benefits of surgery should therefore be weighed against its risks and the convenience of nonsurgical correction.
What are the main risks of LASIK surgery?
Many people are satisfied with their results after LASIK, but side effects can occur during healing, and some complications can last. According to Mayo Clinic, common problems include temporary dry eyes and visual disturbances, while more serious complications are uncommon.
1. Dry eyes and discomfort
LASIK can temporarily reduce tear production. During recovery, your eyes may feel dry, gritty, irritated, or uncomfortable. Dryness can also cause vision to fluctuate or appear blurry at times. Symptoms often improve as the eyes heal, but they can persist in some people.
Existing dry eye is particularly important when considering surgery because LASIK may make it worse. An eye specialist can assess tear production and the health of the eye's surface before deciding whether surgery is appropriate. Some patients may need treatment for dry eye before reconsidering the procedure.
2. Glare, halos, and reduced night vision
After LASIK, lights may appear to have rings around them, streaks, or starbursts. Some people experience glare, light sensitivity, double vision, or difficulty seeing clearly in dim light. These effects can make driving at night or in fog more difficult, even when vision seems good during a standard daytime eye test.
These symptoms often improve during recovery, but they can persist in some cases. Before surgery, discuss your usual driving conditions, work requirements, and other activities that depend on clear vision in low light. Your surgeon should explain how your eye measurements and individual circumstances may affect these risks.
3. Under-correction, over-correction, or changing vision
LASIK may correct less or more of the focusing problem than intended. Some people continue to need glasses or contact lenses afterward, while others may be candidates for an additional procedure. A further operation is not always possible or appropriate, particularly if there is not enough suitable corneal tissue for more reshaping.
Vision can also change over the years. LASIK does not prevent age-related changes in the eye, so a successful result today does not guarantee that glasses will never be needed again.
4. Corneal damage and other surgical complications
LASIK involves creating a thin flap in the cornea and reshaping the tissue underneath it. Complications involving the flap, healing, inflammation, or infection can affect the result. A more serious complication is corneal ectasia, in which the cornea becomes progressively weakened and changes shape.
The U.S. Food and Drug Administration (FDA) also warns that some patients experience a lasting loss of vision that cannot be fully corrected with glasses, contact lenses, or further surgery. Severe visual complications are rare, but their potential impact is an important part of informed decision-making.
Are glasses safer than LASIK?
For most people, glasses are the option with the lowest medical risk because they correct vision without touching or changing the eye. They do not carry the surgical risks associated with LASIK or the contact-lens-related risk of corneal infection.
The main disadvantages are practical rather than surgical. Glasses can fog up, become scratched or damaged, feel inconvenient during some sports, and require prescription updates. Some people also dislike how glasses look or feel. These concerns can affect daily comfort, but they generally do not justify accepting surgical risk unless the expected benefits matter enough to the individual.
Glasses are often a sensible choice for someone who sees well with them, prefers a reversible option, or does not want to take on the possibility of lasting surgical side effects. They are also useful as a backup for people who wear contact lenses or undergo LASIK and later need additional correction.
Are contact lenses safer than LASIK?
Contact lenses avoid an operation and can provide a wide field of view without the frames associated with glasses. They may be convenient for sports, work, or people who prefer not to wear glasses. However, wearing lenses directly on the eye introduces risks that glasses do not carry.
According to the U.S. Centers for Disease Control and Prevention (CDC), contact lens wear is associated with keratitis, or inflammation of the cornea. Microbial keratitis is a potentially serious infection that can damage vision. The risk is higher when lenses are worn too long, slept in when not approved for overnight use, cleaned incorrectly, or exposed to water.
Contact lenses can also contribute to dryness, irritation, allergic reactions, and scratches on the cornea. Following the prescribed wearing schedule, washing and drying your hands before handling lenses, using recommended cleaning and storage products, and avoiding sleeping, showering, or swimming in lenses helps reduce the risk of complications.
Redness accompanied by eye pain, light sensitivity, discharge, or sudden blurry vision while wearing contact lenses needs prompt eye-care assessment. Remove the lenses and seek advice from an eye specialist immediately rather than continuing to wear them.
Who may have a higher risk from LASIK?
Not everyone is a suitable candidate for laser vision correction. A complete eye examination helps determine whether the cornea is healthy and thick enough, whether the prescription is stable, and whether other conditions could affect healing or the final result.
The FDA's guidance on who may not be suitable for LASIK identifies several factors that require particular attention:
- Unstable vision prescription: A prescription that has changed recently may make the result less predictable.
- Thin or irregular corneas: These may increase the risk of structural problems after corneal reshaping.
- Keratoconus or other corneal disease: Conditions that weaken or distort the cornea can make LASIK unsuitable.
- Significant dry eye: Surgery may worsen existing symptoms.
- Certain other health or eye conditions: Autoimmune disease, some medicines, uncontrolled diabetes, and particular eye disorders may affect eligibility or healing.
- Pregnancy or breastfeeding: Hormonal changes can affect the prescription, so surgery may need to be postponed until vision is stable.
Age matters because vision needs and prescription stability change over time. LASIK is generally considered for adults aged 18 and older, with many eye specialists preferring a stable prescription, often by age 21 or later. Being old enough does not automatically make someone a suitable candidate.
Older adults may also develop presbyopia, the normal age-related difficulty focusing on close objects. LASIK intended to improve distance vision does not stop presbyopia, so reading glasses may still be necessary. An eye specialist can explain how age, existing vision needs, and other eye conditions affect the likely benefits.
What should you consider before choosing LASIK?
The decision is not simply about which option provides the sharpest vision. Consider how much glasses or contacts interfere with daily life, whether you are comfortable with surgical uncertainty, and whether the possible benefits justify the cost and recovery process.
Before deciding, discuss these questions with an ophthalmologist:
- Is my prescription stable, and are my eyes healthy enough for LASIK?
- Could dry eye, corneal measurements, pupil size, or another condition increase my risk?
- What are the chances that I will still need glasses or contact lenses?
- How might the procedure affect night driving or activities that require clear vision in dim light?
- What should I expect during recovery, and what follow-up care will I need?
- What is the full cost, including follow-up visits, medicines, and any additional treatment that may be appropriate?
Choose an appropriately qualified eye surgeon who performs a thorough examination and explains alternatives as well as benefits. You should have time to consider the information without feeling pressured to proceed. If glasses already meet your needs comfortably, there is no medical requirement to replace them with surgery.
Which option is best for long-term eye health?
Glasses, contacts, and LASIK can each be reasonable choices when matched to a person's vision needs and eye health. Glasses offer the lowest medical risk and are easy to update. Contact lenses offer flexibility but require consistent hygiene and responsible wearing habits. LASIK reduces dependence on corrective lenses for many people, but it carries surgical risks and cannot guarantee lifelong freedom from glasses.
For people who are comfortable wearing glasses, continuing to use them is often the simplest low-risk option. People who prefer contact lenses can reduce avoidable risks by following their eye-care professional's instructions. Those considering LASIK should base the decision on a full eye examination, realistic expectations, and a clear understanding of the potential for persistent symptoms or lasting visual changes.
After LASIK, contact the treating eye clinic promptly if you experience worsening pain, increasing redness, or unexpected changes in vision. Sudden loss of vision or a major, abrupt change in eyesight warrants urgent medical assessment.