Semi-femtosecond surgery, also known as half-femtosecond laser surgery, is a commonly used surgical method for the correction and treatment of myopia. The principle of the procedure is to use a femtosecond laser to create a corneal flap, and then use an excimer laser to cut the corneal stroma under the flap, so as to achieve the goal of changing the curvature of the cornea and correcting myopia.
The advantage of semi-femtosecond is that it is not only applicable to a wide range of myopia, up to 1,200 degrees, but also can solve the problem of hyperopia in astigmatism, which is more damaging to the cornea than the full-femtosecond, so that the corrected myopia is higher, the precision of the surgery is also very high, and the probability of after-effects after the surgery is smaller.
The disadvantages of semi-femtoseconds are that the surgical incision is larger and it takes most people 3 to 6 months after surgery to relieve dry eyes, and it may also lead to glare and reduced night vision, which can affect night driving. Do not look at electronic products or use your eyes for long periods of time after surgery to prevent eyestrain and affect recovery.
Patients are advised to go to regular hospitals and under the guidance of professional doctors for semi-femtosecond surgery. If there is any abnormality, go to the hospital in time for examination and follow the doctor’s instructions for treatment.