For patients who undergo LASIK or LASEK vision correction surgeries, the hope is to enjoy clear vision for years to come. Yet, some experience a gradual decline in visual acuity over time. While several factors may contribute, myopia regression is frequently identified as the leading cause.
When myopia regression occurs, a detailed assessment is essential to determine the most suitable re-treatment approach. Myopia regression describes a process where the cornea, reshaped by laser during surgery, slowly thickens, altering its refractive power. LASIK and LASEK procedures flatten the cornea to correct refractive errors, but in certain cases, corneal tissue regeneration can lead to diminished visual clarity over time.
Patients with severe or progressive myopia prior to surgery may face additional challenges. Even if the cornea remains stable post-surgery, elongation of the eye’s axial length can cause myopia to worsen.
The probability of myopia regression hinges on various factors, including age, the surgeon’s skill, the surgical technique, the operative environment, and genetic predispositions, making precise predictions difficult. However, higher levels of myopia necessitate greater corneal tissue removal, which increases the risk of regression. Research indicates that regression is more prevalent among LASEK patients than those who undergo LASIK.
When regression occurs, vision can often be restored through re-treatment. The condition of the remaining corneal tissue may dictate a different surgical approach for the second procedure. Repeated laser-based corrections on an already-thinned cornea carry risks, prompting many ophthalmologists to recommend EVO+ ICL (Implantable Collamer Lens) surgery as a safer alternative.
EVO+ ICL surgery involves placing a specialized lens behind the iris without modifying the cornea, eliminating the risk of regression due to corneal thickening. This option is suitable even for patients with thin residual corneas. Additionally, the lens can be removed or replaced if necessary, providing significant flexibility.
Re-treatment for myopia regression following LASIK or LASEK requires considerable surgical expertise, making the choice of clinic paramount. Skilled surgeons can complete EVO+ ICL surgery in approximately three minutes per eye, and many hold certifications from lens manufacturers, a qualification patients should confirm.
Lim Hye Jung, HEALTH IN NEWS TEAM
press@hinews.co.kr
