Can Laser Eye Surgery Go Wrong?

Laser Eye Surgery
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Laser eye surgery, also known as refractive surgery, has gained popularity in recent years as a means to correct vision problems and reduce or eliminate the need for glasses or contact lenses. The procedure involves using a laser to reshape the cornea, thereby improving the eye’s ability to focus. While laser eye surgery has a high success rate and has helped millions of people achieve better vision, it is not without risks. In this article, we will explore the potential complications and risks associated with laser eye surgery and discuss how to minimize the chances of things going wrong.

Understanding Laser Eye Surgery

Laser eye surgery is a precise and delicate procedure that aims to reshape the cornea to correct refractive errors such as nearsightedness, farsightedness, and astigmatism. The most commonly performed types of laser eye surgery include LASIK (Laser-Assisted In Situ Keratomileusis) and PRK (Photorefractive Keratectomy). Both procedures involve the use of an excimer laser to reshape the cornea, but they differ in the way the corneal surface is prepared.

Common Types of Laser Eye Surgery

LASIK (Laser-Assisted In Situ Keratomileusis)

LASIK is the most popular and widely performed laser eye surgery. It involves creating a thin corneal flap, lifting it, and then using the excimer laser to reshape the underlying corneal tissue. The flap is then repositioned, creating a natural bandage for the eye. LASIK offers rapid recovery and minimal discomfort, making it a preferred choice for many patients.

PRK (Photorefractive Keratectomy)

PRK is an alternative to LASIK, suitable for individuals with thin corneas or other corneal irregularities. Unlike LASIK, PRK does not involve creating a corneal flap. Instead, the thin outer layer of the cornea, called the epithelium, is gently removed before the cornea is reshaped using the excimer laser. The epithelium regenerates naturally over time. Although the recovery process is slightly longer compared to LASIK, PRK can be an excellent option for certain patients.

Potential Complications of Laser Eye Surgery

While laser eye surgery has a high success rate, there are potential complications that can occur. It is important to note that these complications are relatively rare, and most patients experience significant improvement in their vision without any issues. Few people know about cosmetic laser eye surgery. However, being aware of the potential risks is crucial.

Dry Eyes

One of the most common side effects after laser eye surgery is dry eyes. This occurs when the eyes do not produce enough tears to keep them adequately lubricated. Symptoms may include a gritty sensation, burning, redness, and blurred vision. In most cases, dry eye symptoms are temporary and can be managed with artificial tears or other prescribed medications.

Halos, Glare, and Starbursts

Some patients may experience visual disturbances such as halos, glare, and starbursts around lights, particularly at night. These visual aberrations can occur due to changes in the cornea’s shape or irregular healing. In most cases, these symptoms resolve gradually over time as the eyes adjust to the changes made during surgery.

Undercorrection or Overcorrection

In some instances, the desired vision correction may not be fully achieved, leading to undercorrection or overcorrection. Undercorrection refers to the residual refractive error that remains after surgery, while overcorrection occurs when too much tissue is removed, resulting in an excessive correction. Enhancements or retreatments can often be performed to fine-tune the results and achieve the desired vision correction.

Infection or Inflammation

As with any surgical procedure, there is a small risk of infection or inflammation following laser eye surgery. Surgeons take precautionary measures, such as prescribing antibiotic eye drops, to minimize this risk. It is crucial for patients to follow postoperative care instructions diligently and report any signs of infection or inflammation promptly.

Corneal Flap Complications (in the case of LASIK)

LASIK involves creating a corneal flap, which is then repositioned after the corneal reshaping is complete. Although rare, certain complications can occur with the corneal flap. These include flap dislocation, epithelial ingrowth (abnormal growth of epithelial cells under the flap), and flap striae (wrinkles in the flap). Most flap-related complications can be resolved with additional treatment.

Epithelial Ingrowth

Epithelial ingrowth is a potential complication that can occur after both LASIK and PRK. It involves the migration of epithelial cells under the corneal flap or the regrowing epithelium in PRK. While most cases are minor and do not cause any issues, severe ingrowth may require intervention.


Regression refers to the gradual return of refractive error after laser eye surgery. Some patients may experience a partial regression over time, requiring an enhancement procedure to regain optimal vision. Proper evaluation and consultation with an experienced surgeon can help determine the risk of regression and ensure appropriate preoperative planning.


Ectasia is a rare but severe complication that can occur after laser eye surgery. It involves the thinning and bulging of the cornea, leading to a distorted shape and vision problems. Ectasia is more likely to occur in patients with pre-existing corneal conditions or those who are not suitable candidates for laser eye surgery. Thorough preoperative evaluations and careful patient selection can help minimize the risk of ectasia.

Factors That Increase the Risk

While the majority of laser eye surgeries are successful, certain factors can increase the risk of complications. It is crucial for both patients and surgeons to consider these factors and make informed decisions.

Pre-existing Eye Conditions

Patients with pre-existing eye conditions, such as keratoconus or severe dry eyes, may have a higher risk of complications. It is essential to undergo a comprehensive evaluation to determine the suitability of laser eye surgery for individuals with such conditions.

Age and Prescription Stability

The stability of the prescription is an important factor to consider before undergoing laser eye surgery. Younger patients with rapidly changing prescriptions may not be ideal candidates, as their prescription may continue to change following the procedure. It is generally recommended to wait until the prescription stabilizes before considering surgery.

Surgeon’s Experience and Skill

The experience and skill of the surgeon performing the procedure play a significant role in the success and safety of laser eye surgery. It is essential to choose a highly qualified and experienced surgeon who has a good track record of performing the specific procedure.

Postoperative Care and Follow-up

Proper postoperative care and follow-up visits are vital for a successful outcome. Patients should diligently follow the surgeon’s instructions regarding the use of prescribed eye drops, avoiding strenuous activities, and attending scheduled follow-up appointments. Regular check-ups allow the surgeon to monitor the healing process and address any potential issues promptly.

Minimizing the Risks

While it is impossible to eliminate all risks associated with laser eye surgery, certain measures can be taken to minimize them.

Choosing an Experienced Surgeon

Selecting an experienced and reputable surgeon is crucial for a successful outcome. Research the surgeon’s credentials, ask for patient testimonials, and discuss any concerns or questions during the initial consultation. An experienced surgeon will conduct a thorough evaluation, provide detailed information about the procedure, and address any specific concerns.

Proper Evaluation and Candidacy Assessment

A comprehensive evaluation is necessary to determine if an individual is a suitable candidate for laser eye surgery. This evaluation includes assessing the patient’s eye health, prescription stability, corneal thickness, and other relevant factors. An experienced surgeon will conduct various tests and examinations to determine if the patient is a good candidate and discuss alternative options if necessary.

Following Preoperative and Postoperative Instructions

Adhering to preoperative and postoperative instructions is crucial for a successful outcome. Patients should follow the surgeon’s guidelines regarding the use of prescribed medications, preparing for the surgery, and postoperative care. Proper adherence to instructions helps ensure optimal healing and reduces the risk of complications.

Regular Follow-up Visits

Regular follow-up visits allow the surgeon to monitor the healing process and address any concerns promptly. Patients should attend all scheduled appointments and notify the surgeon if they experience any unusual symptoms or have questions about their recovery. Timely intervention can prevent potential complications from escalating.


Laser eye surgery is a popular option for vision correction, offering improved visual acuity and reduced dependency on glasses or contact lenses. While the procedure has a high success rate, it is essential to be aware of the potential risks and complications. By selecting an experienced surgeon, undergoing thorough evaluations, following preoperative and postoperative instructions, and attending regular follow-up visits, the risks associated with laser eye surgery can be minimized. It is important for individuals considering this procedure to consult with a qualified professional to determine their candidacy and discuss any concerns.

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