Laser surgery advances offer glasses-free vision correction

For anyone who has worn glasses or contacts for decades, the promise of permanent vision correction has always felt just out of reach—expensive, risky, or simply not quite good enough. That calculus is shifting. At IMO Grupo Miranza, a leading ophthalmology clinic, surgeons now have access to laser technology precise enough to reshape the cornea in increments measured in millionths of a second, opening new possibilities for patients tired of frames and lenses.

The cornea is the eye's focusing lens, and when its curve is slightly off—too steep for myopia, too flat for farsightedness, or uneven for astigmatism—light lands in the wrong spot on the retina, and the world blurs. For decades, glasses and contacts have been the default fix. Refractive surgery offers another path: reshape the cornea itself. Several laser-based techniques exist, including PRK, LASIK, FemtoLASIK, and SMILE, each with its own approach. But the precision has always been the limiting factor. Enter the femtosecond laser.

A femtosecond is one millionth of a billionth of a second. At that timescale, the laser can deliver pulses of energy so brief and controlled that it carves into corneal tissue with micrometric accuracy—cuts so fine they barely disturb the surrounding structures. Dr. Carlos Martín, a refractive surgery specialist at IMO Grupo Miranza, explains that this technology has transformed what's possible. The SMILE procedure, which uses the femtosecond laser, works by creating a precisely shaped lenticular tissue within the cornea, then extracting it through a tiny incision. The shape is calculated using advanced mathematical algorithms, customized to each patient's eye. The result is a less invasive surgery, faster healing, and less trauma to the eye overall.

But precision alone isn't enough. The second pillar of modern refractive surgery is personalization. The excimer laser, which works alongside the femtosecond laser in techniques like LASIK and FemtoLASIK, ablates—or carefully removes—corneal tissue to reshape its curve. These systems now integrate artificial intelligence into their algorithms, allowing surgeons to account not just for the type and magnitude of the refractive error, but for the individual patient's anatomy and life. A 45-year-old athlete with thin corneas and high myopia will need a different approach than a 60-year-old office worker with presbyopia, or age-related focusing difficulty. Factors like corneal thickness, the stability of the prescription over time, overall eye health, and even daily activities and profession all feed into the decision of which technique to use and how to customize it.

Dr. Martín notes that this personalization extends beyond the choice of laser. It shapes the entire treatment plan. The goal is not just to correct vision, but to do so in a way that preserves the eye's anatomy and function, minimizes recovery time, and aligns with what the patient actually needs to see clearly in their daily life.

For some patients, laser surgery isn't the answer. Those with very high prescriptions or certain eye characteristics may be better served by intraocular lenses—artificial lenses implanted inside the eye, similar to those used in cataract surgery but designed for vision correction in otherwise healthy eyes. These phakic intraocular lenses, or ICLs, represent a different pathway to the same goal: freedom from glasses and contacts, achieved through a permanent structural change to the eye.

What's emerging is not a single solution but a menu of options, each tailored to the individual. The technology has matured enough that the limiting factor is no longer what's possible, but what's right for each person. For millions of glasses-wearers, that shift opens a door that was previously closed.