The causes of vision regression in full femtosecond surgery mainly include myopia regression, postoperative undercorrection or overcorrection, and cone cornea.
If the patient is younger, the eyeball may still develop, and continue to fatigue the eyes after surgery, such as long hours or stay up late to look at electronic products such as cell phones, computers, etc., and do not develop good eye habits, the patient may again appear myopia, which is manifested as regression of visual acuity.
If the full femtosecond surgery is undercorrected or overcorrected, because the surgery does not correct myopia well, patients may also experience vision loss. Undercorrection or overcorrection is often associated with incorrect preoperative examinations or errors in examination values due to the patient wearing corneal contact lenses prior to surgery.
Full femtosecond surgery requires the cutting of corneal tissue, and if the patient’s cornea is thin, cone cornea may gradually appear after the surgery, which may lead to the patient’s vision loss.
It is recommended that patients with vision loss after myopia surgery should consult a doctor in a timely manner to assess their condition and follow the doctor’s instructions for treatment.