What degree range is suitable for SMILE (Small Incision Lenticule Extraction)?
Full femtosecond laser surgery is a commonly used laser surgical procedure. Its main advantage lies in its ability to surgically treat high-degree myopia and achieve satisfactory therapeutic effects, restoring the vision of patients with high-degree myopia to a normal level. When undergoing full femtosecond laser surgery, it is important to be aware of certain precautions and indications. Generally, this surgery is suitable for myopia with a degree ranging from 600 to 1200.
1. Suitability of Full Femtosecond Laser Surgery
Currently, the full femtosecond laser instrument can treat myopia up to 1000-1200 degrees, generally suitable for myopia with a degree ranging from 600 to 1200. Whether a patient is suitable for full femtosecond laser surgery depends not only on the degree of myopia and astigmatism but also on various preoperative examination results, such as corneal thickness, corneal topography, corneal symmetry, cone cornea tendency, and pupil size, especially at night.
2. Core Technique of Full Femtosecond Laser
The main technical core of full femtosecond laser is to precisely locate the laser on the corneal stroma, create an intraocular lens within the corneal stroma, and then remove it to change the refractive power of the cornea. This technique has already been applied clinically. In contrast, most previously used femtosecond lasers in LASIK surgery could only create a corneal flap and must be used jointly with excimer lasers to achieve the desired treatment outcome.
3. Advantages of Full Femtosecond Laser
Full femtosecond laser significantly reduces surgical risks, offers high precision without being affected by corneal curvature, and has a broader correction range. It relatively avoids iatrogenic infections and provides superior postoperative visual quality. It can accurately locate the desired cutting depth with high predictability. The unique corneal surgical system can alter various cutting parameters with high predictability, greatly reducing corneal thickness errors. Therefore, it can treat high-risk patients who were previously ineligible for surgery. The surgery features a unique contact mirror design with different sizes suitable for different eyes, avoiding discomfort caused by increased intraocular pressure during negative pressure suction and facilitating better intraoperative cooperation. The entire surgical process achieves true minimally invasive surgery, ensuring a "no incision" state after surgery.
