Abstract: in most cases, myopia correction surgery is selective surgery. Whether it can be operated or not is not absolute. Each individual needs to comprehensively measure the risk-benefit ratio in combination with his own situation, including age, occupation and habits. Preoperative ophthalmic examination was further judged. Including diopter, corneal thickness, corneal morphology, pupil size, intraocular pressure, fundus, etc.
myopia! The reason why people with
are short-sighted is that the anterior and posterior axis of the eyeball becomes longer or the curvature of the lens becomes larger, resulting in the imaging of objects in front of the retina, so they can’t see distant objects. The main reasons for myopia are heredity, development and eye habits.
various studies at home and abroad have shown that once myopia occurs, it is irreversible (except pseudomyopia).
can really correct myopia, and there are only two methods:
① wear appropriate glasses and corneal shaping glasses
② surgical treatment
wear glasses, which is simple and safe, but often affects the beauty. Moreover, all kinds of inconveniences of wearing glasses also exist objectively. Even, some special occupations can’t wear glasses.
therefore, since the emergence of laser myopia surgery, it has become popular all over the world. So far, tens of millions of myopia patients have regained clear vision through surgery and getting rid of the shackles of glasses. The following is a summary of common problems in myopia surgery.
meet what conditions and can accept myopia surgery?
in most cases, myopia correction surgery is a selective surgery. Whether it can be operated or not is not absolute. Each individual needs to comprehensively measure the risk-benefit ratio in combination with his own situation, including age, occupation and habits. Preoperative ophthalmic examination was further judged. Including diopter, corneal thickness, corneal morphology, pupil size, intraocular pressure, fundus, etc.
determine whether it is suitable for surgery and which surgical method is suitable according to the examination results. At present, the diopter range that can be corrected by laser corneal refractive surgery is within 1200 degrees of myopia, 600 degrees of hyperopia and 600 degrees of astigmatism. Moreover, the corneal thickness is required to be suitable, and corneal diseases such as keratoconus need to be excluded.
who can’t do laser surgery?
if you have the following problems, you cannot accept laser vision correction:
1 There are ocular active inflammation
2 Autoimmune diseases such as systemic lupus erythematosus
during pregnancy and lactation of women 4 How can
laser surgery correct myopia?
the eyeball is like a complex and precise camera. The cornea at the front is the lens. Myopia is mostly due to the long axis of the eye. When parallel light enters the eye, the image on the film is blurred before it is imaged on the film, that is, the retina.
myopia correction surgery is to cut the central position of the cornea of the eye to change the focal length of the human eye, so as to achieve the purpose of treating myopia. At present, excimer laser surgery is generally used, which is a very effective means of myopia correction.
if you have planned the operation, please make the following preparations:
preoperative examination: you need to stop wearing contact lenses for at least one week; If it is a hard corneal contact lens, you need to stop wearing it for at least one month. After preoperative examination of
: if the examination results are suitable for the operation, drop anti-inflammatory ophthalmic drugs according to the doctor’s advice.
feeling in the operation
the whole myopia operation process usually takes less than 10 minutes. The real laser time is only a few seconds. The anesthetic will be dropped on the eye surface. After the operation, you will wear a transparent eye mask to avoid rubbing your eyes because you forget to do the operation. Recovery after
generally have some reactions on the day of operation: such as foreign body sensation, sour eyes and tears. These are normal reactions after operation and can disappear the next day.
need to be rechecked the next day after operation. Follow the doctor’s advice and avoid using make-up and skin lotion around the eyes.
principle of myopia surgery
1. Excimer laser myopia surgery is safe and effective. The
excimer laser is used to treat myopia. The operation uses gaseous hydrogen fluoride to generate a laser with a wavelength of 193nm, With the speed of cutting tissue of one fourth of a millimeter (equivalent to 1 / 200 of hair) per pulse, the cornea is cut very accurately under the close control of the computer, so as to change the corneal curvature and fundamentally treat myopia.
2. V4C intraocular lens implantation – Non-destructive corneal high-end myopia correction technology
v4C is a high-end myopia surgery without damaging the cornea and the only reversible myopia surgery in the world. It can be used to correct a wide range of myopia, hyperopia and astigmatism without removing or destroying corneal tissue and post-operative suture. At the same time, it can achieve predictable refractive correction and excellent visual quality. Especially for the treatment of high myopia.