What Is ASA Eye Surgery and Who It’s Best For

Advanced Surface Ablation (ASA) is a new and safer laser eye surgery, out of a number of methods available, that treats nearsightedness, farsightedness, and astigmatism. ASA is a flapless technique that offers safer outcomes compared to laser eye surgery, without sacrificing efficiency. This blog discusses what ASA eye surgery is, how it compares to other popular laser procedures, who are the best candidates for ASA laser eye surgery, and what patients can achieve as benefits with this advanced treatment.

What is ASA Laser Eye Surgery?

Advanced Surface Ablation (ASA), also known as the modern version of Photorefractive Keratectomy (PRK), is a laser surgery that corrects vision problems, including nearsightedness, farsightedness, and astigmatism. In contrast to LASIK, ASA does not include the creation of a flap in the cornea. Instead, the thin superficial layer of the cornea, called the epithelium, is carefully scraped away.

With the epithelium removed, an excimer laser will then recontour the corneal tissue beneath. This recontouring will alter the way light enters the eye, resulting in improved vision. The complete surgery takes approximately 15 minutes per eye and accommodates sophisticated laser vision correction to achieve the necessary precision.

How ASA utilizes corneal remodeling to improve vision

During an ASA, the surgeon will stay within the guidelines of the treatment plan while utilizing a computer-assisted laser to precisely remold the surface of the cornea. The laser directly treats the stromal tissue underneath the scraping of the epithelium; The actual modification is what changes the eye’s capacity to focus for the patient, without the aid of glasses or contact lenses.

Once the procedure is completed, the cornea will begin to heal, as the epithelium regrows, and pain and sensitivity are experienced through the healing process that may take about five to seven days. Even though some pain and sensitivity are to be experienced throughout healing, the improvement of vision will continue to progressively evolve throughout the days and weeks that follow the entire process.

Differences between ASA and flap-based surgeries

ASA is a flapless laser corrective surgery, whereas LASIK is flap-based surgery (involving flap creation). Therefore, there is no risk of flap dislocation or nerve damage, which can occur in flap creation. ASA is better suited for people with thin corneas, active lifestyles, or a longer-term concern of flap complications. 

ASA tends to have a longer recovery, whereas LASIK patients may have rapid improvement within a day or two. ASA patients will experience clarity in a week or two and will take up to a month to fully recover.

History and safety of ASA

ASA has been in practice for over 20 years. It was developed as a safer alternative to earlier surgeries and is not a new procedure. ASA has a better safety record than flap-related procedures, and they occur much more infrequently. It minimizes risks of epithelial ingrowth, flap dislocation, and nerve damage.

All modern-day ASA techniques are now wavefront/topography guided and offer much personalized correction. Many of the ASA candidates are modern-day consumers whose prescriptions are either quite large or whose corneas are not quite as thick. Less tissue preservation is the major artery of safety with ASA.

ASA is also a safe, effective, and minimally invasive way to correct vision on a long-term basis, with 20 years of successful outcomes to support the method and equipment.

Comparing ASA with LASIK and PRK: Key Differences and Similarities

How does ASA eye surgery compare with LASIK and PRK?

ASA, or Advanced Surface Ablation, is much like PRK (photorefractive keratectomy) because both are surface treatments of the cornea. ASA is similar to PRK in that both procedures involve the outer epithelium layer of the cornea being removed to expose the corneal tissue underneath that will be reshaped by the excimer laser. LASIK is a different procedure where a flap is created in the cornea, the flap is lifted aside, the tissue underneath is reshaped, and then finally, the flap is replaced.

In safety, the major advantageous distinction of ASA relative to LASIK is that ASA does not have the risks of creating a flap, such as nerve damage to the cornea, flap dislocation, scarring, etc. ASA is better for those patients with thinner corneas and for patients who play contact sports. There are fewer dry eye symptoms because of no flap, as there is no condition where the flap is put back in place. Fewer problems with night vision disturbances also occur without a flap.

Both ASA and LASIK deliver highly successful results, with nearly 98% of ASA patients achieving 20/20 vision. One key advantage of ASA is its ability to treat a wider range of prescriptions than LASIK, including higher or more irregular refractive errors. Recovery, however, is where the two procedures differ. LASIK patients often notice improvements within the first day, with vision typically stabilizing within a month. ASA patients, on the other hand, experience a slightly longer healing process—initial recovery usually takes 3–5 days, while full stabilization may take a month or more.

Market trends have shown that ASA and PRK are now becoming more popular because they are safer alternatives to non-cutting procedures, especially for vulnerable patients for whom the increased risk of LASIK surgery may jeopardize the surgical visual outcomes. 

Overall, ASA is a safer, less invasive option that offers similar visual outcomes compared to LASIK, especially for patients who have defined eye conditions according to the vision correction candidates and higher-risk surgeries.

Advantages and Benefits of ASA Eye Surgery

Advanced Surface Ablation (ASA) offers a lot more benefits when compared to traditional LASIK. First, ASA has a superior safety profile. Because ASA doesn’t produce a flap, the likelihood of flap issues like flap slippage, epithelial ingrowth, or damage to corneal nerves is no longer a risk (compared to LASIK). ASA is therefore better for any patients with a thinner cornea and those who have a more active lifestyle who are more likely to be engaged in contact sports, because they are poor candidates for LASIK (the flap creates a risk of injury to their eyesight or the durability of their eye health).

Second, ASA helps us to preserve more cornea. ASA preserves more corneal tissue because there is no flap. Thus, the corneal structure can be stronger and more intact long-term. ASA is associated with fewer dry eyes and less visual disturbances at night related to LASIK.

When maintaining a clear vision, ASA can offer very precise, customized corrections provided by sophisticated laser technologies that lead to better than 20/40 vision or, on average, greater than 20/20 vision for the majority of patients. ASA does produce long-term improved vision with an accuracy that is at least equal to or greater than LASIK.

More and more people, including eye surgeons, are leaning towards knowing about potential complications and risks related to flap-based surgeries, thus, ASA is gaining in popularity as a newer, safer option for a larger group of patients choosing vision correction methods. ASA offers a combination of safety, convenience, and use of less invasive procedures that may appeal to an overall group of patients needing long-term clear vision.

Who is the Best Candidate for ASA Eye Surgery?

What are the criteria for eligibility, do you have to be a certain age or is a stable prescription needed?

The best candidates for ASA (Advanced Surface Ablation) eye surgery are anyone above the age of 18. They cannot have any issues with their vision, and also have a stable vision prescription for around a year to two years. This means that their refractive error is stable and will not change significantly.

Why is corneal thickness and the overall health of your eyes significant?

Candidates must have healthy eyes. There cannot be infections, inflammation, or any other underlying issues, such as, but not limited to, corneal swelling, corneas affected by glaucoma, cataracts, infections, or autoimmune diseases. Corneal thickness is also important in evaluating an ASA candidate. ASA, compared to other laser treatments, may be indicated for those with thinner corneas than LASIK because no flaps are created. This is safer for them to compensate for the fact that flaps are not being created in-phase, and laser(s) will be treating a flatter or thinner cornea.

Is ASA good for patients experiencing dry eyes or those with active lifestyles?

Yes. Considering ASA has fewer dry eye complaints compared to LASIK, ASA is good for people with dry eyes, and for patients who may participate in contact sports or have a physically active lifestyle. The rationale here is that ASA eliminates anything mechanical or procedural pain that the patient would feel related to the surgical change of the cornea.

How significant is the consultation and personal evaluation?

In advance of a patient receiving ASA, there must be a consultation. The consultation (the visit before the ASA) is important and will include total eye care, corneal and corneal thickness scans, to help us determine patients who are willing to go ahead with ASA. These adjustments to the patient’s correct prescription and adjustments to their performance should be a priority, and personal evaluations help us to minimize the risk of complications and make the correction to achieve optimal gains.

By meeting these criteria and under the guidance of a qualified surgeon, patients can enjoy the benefits of ASA as a safe and effective vision correction option.

The ASA Eye Surgery Procedure and Technology

Step-by-step process for surgery

Advanced Surface Ablation (ASA) begins with topical anesthetic drops placed into the eye to numb it. The epithelium, or outer layer of the cornea, is then painlessly removed, exposing the tissue underneath.

After the surface of the cornea is prepared, the excimer laser is used to reshape the deeper layers of the cornea. The laser will adjust the corneal shape to fix the vision problem, whether it is myopia (nearsightedness), hyperopia (farsightedness), or astigmatism.

After the excimer laser application, the eye is fitted with a bandage contact lens to protect the surface as it heals. The entire procedure takes approximately 15-20 minutes per eye (the laser is active for about 8 seconds per diopter of correction).

Use of excimer laser and wavefront guided technology

SA uses new excimer lasers that allow for precise reshaping of the cornea. Many clinics today use a wavefront-guided procedure, which entails creating a precise map of the imperfections in the eye using optical wavefront sensors, which allows for an individualized correction that often leads to improved vision outcomes.

The individualized form will help the applicant reduce higher-order aberrations, so patients will have improved overall vision and reduced symptoms associated with glare or halos, especially at night.

Duration of the procedure and the method of anesthesia

When both eyes are performed together, the procedure will typically take about 15-20 minutes to complete. Topical anesthetic drops are placed on the eyes before surgery and used to numb the surface of the eye, so that the patient will not feel any pain during the operation. Patients are awake and remain awake during the procedure, and it is an outpatient procedure, so the patient will return home shortly after.

Comparison to older PRK techniques

ASA is similar to traditional Photorefractive Keratectomy, or PRK; however, ASA uses newer laser technology and techniques to offer the patient a better surgical experience. ASA will generally give the patient less discomfort, less haze formation, and a shorter recovery time than older PRK methods. ASA has the same surgical steps to remove the epithelium and reshape the cornea as with PRK, but ASA’s precision will result in quicker visual stabilization and less discomfort in the postoperative recovery time.

Recovery Process and Visual Outcomes after ASA

What can I expect for recovery and post-operative outcomes of ASA surgery?

The recovery from ASA is a gradual process that takes time while the surface of the cornea heals. Usually, the recovery period is from several days to a few weeks. In the first 1-3 days after surgery, patients can expect very mild discomfort, very mild light sensitivity, some dryness, and some blurred or cloudy vision. They will receive eye drops to help relieve excessive dryness and pain medications to help manage discomfort.

Within the first week to two weeks after ASA surgery, most patients note noticeable improvement in their vision, and the discomfort they experienced has diminished as the epithelium layer of the cornea heals.

During the healing process, the stabilization of visual acuity typically takes a few months after surgery, as the corneal layer continues to heal and adjust to the changes that ASA made to the cornea.

In ASA, a corneal flap is not created, which makes it safer for people who either have thin corneas or dry eyes. The overall long-term effectiveness of the procedure is important to note. Vision is restored satisfactorily for roughly ~ 98% of patients who achieve 20/20 vision or better following ASA surgery. ASA is equally effective in treating nearsightedness, farsightedness, and astigmatism with results that are both consistent and applicable as the expeditious, safe, and reliable method to correct or ameliorate refractive error in his/her eyes.

Discomfort and post-operative care

After surgery, patients are given a bandage contact lens placed on the eye for 3-5 days. The bandage contact lens reduces discomfort during recovery and aids healing. Patients should expect mild discomfort or dryness for the first 1-3 days, but are able to use lubricating eye drops. They will be instructed to avoid excessive activity or anything demanding strenuous energy expenditure on their eyes for that period.

We ask patients to come back for monitoring and follow-up visits. Typically, they are instructed to avoid rubbing their eyes and watch for bright light. Extending the effects of medications will help alleviate discomfort and will help with sustaining good eye hygiene for their eyes in the week(s) after surgery.

Visual improvement timeline and outcomes

It is typical for the vast majority of patients to start to see substantial improvement within the first couple of weeks. Complete stabilization in one’s vision can take up to 3-5 months, as the eye heals and adapts to the change. When healing is complete, the effects of surgery are more stable and long-lasting.

Final visual outcomes are very favorable for the vast majority of ASA patients. They achieve 20/20 vision or better in treating their refractive error compared to the meaningful adverse effects of refractive error left in the patients’ eyes due to the condition post-operation.ASA offers a safe and effective treatment of refractive error compared to other laser treatments available.

Comparison of recovery with LASIK

The recovery of ASA is longer, steeper, and gradual compared with LASIK. Normalizing recovery time, LASIK patients often have quicker recovery in terms of visual recovery post-operatively, even shortly after the operation, while others may have discomfort during the recovery. ASA recovery may see a passionate time span 3 -7 days of discomfort and blurry/cloudy vision. The healing time is ultimately longer in ASA versus laser vision surgery.

While LASIK may allow one to fully return to their regular lifestyle and activity sooner, the duration of initial discomfort is definitely compensated for (for most), as ASA will result in fewer long-term complications, particularly for patients with dry eyes/thin corneas.

Safety and Potential Risks of ASA Eye Surgery

What are the risks and possible complications of ASA eye surgery?

Although ASA (Advanced Surface Ablation), called PRK, is a safe procedure with lower risk factors than LASIK, and while eliminating most of the risks of LASIK, patients may experience some normal side effects during recovery, which could be mild discomfort, light sensitivity, and dry eye. All of which can be handled with prescribed eye drops and are resolved as the eye heals. There is a chance of corneal swelling or haze, which is typically temporary and treatable.

More serious complications are very rare. The worst case would be corneal ectasia, progressive thinning, or dishing of the cornea, but under the right patient selection, this is a rare complication. With ASA, there may also be residual refractive errors, meaning the laser treatment did not push the vision up to par, such as under-correction or over-correction. These would be treated in a doctor-in-office enhancement procedure afterward.

For the most part, patients adapt to ASA very well, but we must also consider the possibility of visual disturbances at nighttime – glare, halos, or starbursts. This is generally worse at first, and usually decreases with time. There is always some risk of infection with any procedure; however, the incidence is very low with appropriate post-operative care and hygiene.

As with all procedures, a skilled surgeon is an important factor. When a surgeon has the specific training and experience to perform an ASA and then utilize highly precise surgical technique when performing the ASA procedure, the likelihood of any adverse outcome can be minimized. Adverse events could be avoided with proper screening for ASA, and a competent surgeon will determine if an appropriate candidate exists. The surgeon will also weigh the potential risks involved – thin corneas, high prescriptions, and ocular issues, etc.

Generally speaking, ASA has less long-term risk associated with it than LASIK because there is no flap created with ASA. If a flap were created and then, by any chance, became dislodged, there are more post-surgical complications. Nerve damage (with creating a flap), dislocated flap issues, and dry eye are all minimized.

Key takeaway: ASA has an excellent safety record. Being aware of possible risks, appropriate candidate screening, and the medical competence of the surgeon are all important factors in producing a safe and effective outcome.

Is ASA Eye Surgery Right for You?

When exploring laser eye surgery, it is important to weigh ASA (Advanced Surface Ablation) against the other options available, including LASIK. The factors that impact your decision include the health of your eyes, including the thickness of your cornea, your lifestyle, and your specific visual needs.

ASA would likely be better suited for people who may have thinner corneas or dry eyes in an event where LASIK would not be safe. Unlike LASIK, ASA leaves the corneal flap intact and avoids putting patients at risk for flap dislocations or corneal nerve damage. ASA is considered a safer option for people who have an active lifestyle or want a more conservative approach.

A personalized consultation is the most important step in deciding candidacy. During a free, in-person evaluation, the doctors and qualified care team will assess patients using wave scans to look for higher-order aberrations and further evaluate your vision correction with consideration to your specific individual eye profile.

The long-term benefits of ASA may include having fewer complications, a lower likelihood of having dry eyes, and fewer disturbances with night vision. ASA also preserves more corneal tissue moving forward if other procedures are required. ASA may involve a longer recovery period, which generally takes about 3-5 days to reach the initial healing stage, and further healing ranging from 2-4 weeks for the best correction results. Patients like ASA for its safer profile and often prefer the lasting results.

Key takeaway: ASA also has unique advantages of being a less invasive and lower-risk procedure, with reasonable long-term outcomes. Consider making choices on laser vision correction that fit well with your corneal condition, intended lifestyles, and overall personal health – and consult with experienced surgeons who can tailor to your needs.

Conclusion: What you should know and consider about ASA Eye Surgery

Advanced Surface Ablation offers a compelling and safe alternative for patients who do not meet the criteria for traditional LASIK eye surgery – especially for patients who have thin corneas, dry eyes, or higher prescriptions. Since ASA does not create a corneal flap, the risk of certain complications is substantially reduced, but with the added benefit of delivering comparable visual results. While ASA patients will typically have a longer recovery time in comparison to LASIK, long-term, the benefits of fewer side effects and a better overall safety profile make ASA a good consideration for many patients. All individuals who are considering vision correction options should always ensure that they receive thorough consultations from qualified surgeons to limit their risk, assess candidacy, and determine if ASA is a good fit for their particular needs and lifestyle.

If you’re thinking of ASA eye surgery to improve your vision and reduce reliance on glasses or contacts, it’s important to speak to an expert to figure out if this process is right for you.

Looking for laser eye surgery in NYC, NJ or Atlanta, GA? Diamond Vision offers world-class LASIK options from LASIK surgeon Dr. Steven Stetson, an award-winning LASIK surgeon. Don’t delay your chance for clear vision – contact us for a free consultation today.

References

• LASIK vs. PRK vs. ASA (Pros & Cons) – Moskowitz Eye Care

• What is the most popular Laser Eye Surgery today?
  

• Advanced Surface Ablation (ASA) | Chicago Cornea Consultants

• ASA (Advanced Surface Ablation) Laser Eye Surgery

• The Difference Between LASIK and ASA

• ASA & PRK Surgery Kansas City, Missouri – Discover Vision Centers

• ASA vs. LASIK – Which Is Right for You? – Collins Vision

• ASA/Advanced PRK LASIK Alternative St. Louis – Brinton Vision

• Laser Eye Surgery in America | What’s the Best Vision Correction …

• Big Controversies with LASIK | Is LASIK Safe? – Moskowitz Eye Care