Can ReLEx laser be used for personalized myopia surgery?

In general, no. Depending on how well your eyes are examined, the diagnosis will be made by a professional ophthalmologist. Personalization is "tailor-made", and the most suitable surgical correction plan can be tailored to the individual's eye condition.

Everyone's eyes are different, and myopia surgery needs to be based on examination data, and the surgery method that should be chosen will be different if the eye data is different. Personalized surgery can ensure a better outcome for the patient. If a hospital only offers full femtosecond or half femtosecond surgery, those who are only suitable for full laser may not be able to achieve good results, so personalized myopia surgery is more beneficial for patients.

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Femtosecond laser is one of the excimer lasers, generally speaking, the process of laser myopia is to make a flap on the cornea, and then open the corneal flap, and the stromal layer under the flap is precisely cut according to the degree of myopia, farsightedness and astigmatism, so that the eye forms a natural lens, so as to achieve the purpose of myopia. Compared with ordinary excimer surgery, the special feature of "femtosecond" is that a laser is used instead of a lamellar knife when making a corneal flap, so that the corneal flap made without a knife is more accurate, which is a blessing for patients with thin corneas. Want to have myopia surgery and be afraid of expensive?

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Personalized surgery is generally performed on a half-femtosecond basis. ReLEx is also a personalized surgery, tailored for each myopic person to achieve better visual quality.

ReLEx: Two laser scans of different depths are performed in the corneal stromal layer to form a complete convex lens-shaped corneal tissue. A small incision is then made at the edge of the cornea with special instruments. Then remove the corneal tissue that was done earlier. The surgery was done.

Although ReLEx surgery has the advantages of flapless, minimally invasive, and comfortable experience, with the current level of technology, ReLEx cannot achieve a high standard of personalization. With the unique advantages of meticulous craftsmanship, personalized femtosecond LASIK can better meet special groups of people who have high requirements for visual quality.

The contraindications to ReLEx laser myopia surgery are as follows, and it is recommended to consult a local ophthalmologist for specific conditions

1. Exclude active ocular disease: there can be no systemic diseases, such as diabetes mellitus and immunosuppression, and surgery is not recommended for these patients.

2. The expectation of surgery is too high: the operation should be cautious, and the age should not be too young, generally required to be over 18 years old, and the refractive state should be stable in the past two years, that is, the annual degree change can be within 50 degrees.

3. There are requirements for the degree of prescription: different laser surgeries require different degrees of myopia, lamellar corneal surgery generally cannot exceed 1200 degrees, femtosecond laser surgery cannot exceed 1000 degrees, and superficial surgery generally does not exceed 800 degrees.

4. There are requirements for the thickness of the cornea: after the cornea is removed, the thickness of the remaining corneal stromal layer should be at least 250mm, and it is recommended to be more than 280mm.

5. Pupil diameter: For example, the value in dark light and low light, if the pupil diameter is too large, it may cause astigmatism after surgery, resulting in poor night vision. As the Jinan Branch of Huaxia Eye Hospital, under the leadership of Director Wang Lihua, it has strictly abided by the criteria of precise technology and safe surgery for many years, and has made continuous progress to strive to do a good job in all eye surgeries.

In order to achieve a certain level of safety in myopia eye surgery, it is necessary to check the indicators of the eye, including visual acuity, refraction, fundus (dilated pupil), intraocular pressure, computerized optometry, corneal topography, corneal thickness and other corresponding examinations necessary for surgery. If the cornea is not thick enough and the prescription is relatively high, it is not safe to perform surgery in this case. In addition, if the cornea has corneal curvature, it is not suitable for surgery.

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"Full femtosecond"The surgery is not suitable for people.

1. Myopia degree of more than 1000: The myopia correction surgery of ReLEx requires the patient's myopia degree to be within 1000 degrees, and the degree of astigmatism for patients is less than 500 degrees. Patients with myopia above 900 degrees are temporarily not suitable for ReLEx surgery.

2. The corneal thickness is less than 450 m: ReLEx myopia correction surgery uses femtosecond laser to make a corneal stromal lens of corresponding thickness and a tiny corneal incision, and the made lens is removed through the corneal incision, so there are certain requirements for corneal thickness.

3. Patients with active eye disease: For patients with blepharitis, acute stye, conjunctivitis, dacryocystitis, corneal ulcer, keratitis and other eye diseases, they should be cured before the ReLEx surgery, and the surgery can only be considered after the condition is controlled.

4. Patients with contraindications to systemic surgery: ReLEx myopia correction surgery has very strict requirements for myopia patients in all aspects, in addition to the above three points, they must not suffer from autoimmune diseases, such as diabetes and other diseases, because these diseases will affect the healing of surgical wounds; Patients with scarring constitution are also not eligible for ReLEx surgery.

In addition, for patients with eye diseases such as keratoconus, glaucoma, corneal endothelial degeneration, etc., myopia correction surgery is also not allowed.

Regarding the indications of femtosecond lasers, there are two points to pay attention to. The first degree, such as ultra-high myopia of more than 2000, is difficult to do a full femtosecond laser. The thickness of the cornea determines how much this power can do.

For example, if you have 1000 degrees of myopia, if the corneal thickness is less than 450 microns, you can't do it.

Both of these factors are taken into account for femtosecond laser surgery, one is the thickness of the cornea and the other is the power. In the case of a normal corneal thickness, such as 550 microns, 1000 or even 2000 degrees will suffice. Femtosecond laser is a very mature surgery with modern technology, so it is very safe and effective for both the highest, medium, and low degrees.

As long as the corneal thickness can be guaranteed within a certain range, this problem can be solved.

Absolute contraindications.

It refers to diseases that seriously affect the effect of surgery, so myopia eye surgery should never be done, and there are four main categories:

1.keratoconus, glaucoma, rabbit eye, severe dry eye, and active ocular inflammation;

2.Patients with severe amblyopia with very poor corrected vision;

3.Systemic diseases that affect wound healing, such as diabetes, autoimmune diseases, etc.;

4.Those with mental and psychological abnormalities, who have extremely high requirements for vision, and who are extremely concerned about surgery.

Relative contraindications.

It refers to some diseases that can be operated on after being improved:

1.Eye diseases include simple dry eye, chronic blepharitis, conjunctivitis, strabismus, high intraocular pressure, myopic fundus disease, etc., 2Systemic diseases include drug allergies, high blood pressure, high blood sugar, etc.

Patients with mild dry eye can be treated with artificial tears**; Antibiotic eye drops for chronic inflammation of the eye; Fundus laser can be performed for fundus disease**, and surgery will be performed after two weeks; Patients with high intraocular pressure should first rule out glaucoma, and surgery can be performed after the intraocular pressure is lowered; Patients with systemic disease should undergo ** and wait until their condition is stable before surgery.

If the glasses have inflammation, femtosecond laser surgery is not recommended, and if the glasses are myopia, you can do it.

Diseases of the heart organs such as high blood pressure, heart disease, and hyperglycemia cannot be performed with surgery**.

It is best to ask a professional this question, consult a few eye hospitals, and learn more before making a decision.

Under what circumstances should ReLEx laser surgery not be done? It depends on your physical condition.

It must be that you have an eye disease or a second surgery.

The whole process is the smallest and safest surgical method for laser surgery, such as cutting the cornea through laser scanning and then removing the cut cornea under the cornea.

In the whole process of ReLEx laser surgery, there is no need to make an open corneal flap or an excimer laser, but to use the ReLEx laser to completely shape the corneal matrix through two interlaminar blasts of different depths in the cornea, and then remove it through a small incision of 2-4mm to complete the operation.

In terms of age, ReLEx laser surgery requires patients over 18 years old and under 50 years old; The degree of myopia should be below 1200 degrees, and the degree of myopia has been stable for more than two years without development.

These groups of people are not suitable for ReLEx surgery for the time being:

1. Those with too high myopia.

Generally speaking, the best results are achieved within 900 degrees of myopia in the range of ReLEx surgery**. For patients with too high myopia, it is best to choose ICL lens implantation to correct high myopia.

2. The cornea is too thin.

First of all, you should know the location of ReLEx surgery** myopia. ReLEx surgery**Myopia is the remodeling of the cornea, which requires the ablatation of a part of the corneal stromal layer, or the removal of the corneal stromal lens, so there are certain requirements for the thickness of the cornea, and the corneal thickness is generally required to be greater than 500 microns.

3. Those with active ocular diseases.

ReLEx surgery**Although myopia is only a routine operation on the cornea, if you have blepharitis, acute conjunctivitis, corneal ulcer, keratitis, dacryocystitis, stye and other active eye diseases, you should be active before surgery**, and surgery can only be considered after the condition is controlled. In addition, patients with eye diseases such as keratoconus, glaucoma, and corneal endothelial degeneration cannot undergo ReLEx surgery.

4. Those with contraindications to systemic surgery.

In addition to the above three points, the patient must not suffer from autoimmune diseases, diabetes and other diseases that will affect wound healing; Patients with severe scarring constitution are also not allowed to operate. In addition, patients who are very concerned about the idea of surgery and cannot cooperate well with the doctor's operation cannot do the full femtosecond surgery.