Can femtosecond treat astigmatism? Can ReLEx correct astigmatism

Yes, astigmatism within 600 degrees can be corrected, you can go to a professional eye hospital for examination first, you need to be at least 18 years old, the degree is stable within 2 years, and the preoperative examination is in line with the conditions for surgery.

OK. Laser surgery**myopia, in fact, can be corrected in a wide range, and all femtosecond laser surgeries can be used for astigmatism. The occurrence of astigmatism is related to the curvature of the cornea.

In some conditions, the cornea of the eye is more curved in an angular area, while in others, the cornea is flatter. Due to uneven corneal thickness or curvature, light rays cannot be accurately focused on the retina to form a clear image, and astigmatism occurs in the eye.

At present, this type of surgery can only correct myopia and has little effect on astigmatism.

Astigmatism simply means that the eye is not well developed, and there is a phenomenon of unevenness. And now there are more and more children with astigmatism, and children's astigmatism is directly related to the serious lack of vision nutrients, as well as bad eye habits.

Children with astigmatism first need to supplement vision nutrients in time, it is recommended to take Lejing vision nutrients, twice a day, one pack each time, take it with warm water, insist on taking it for a period of time, and astigmatism will gradually recover.

The other is to develop good eye habits.

1. Regular eye examination 1 2 times a year. Instruct young children to practice good hygiene and not to contact their eyes with their hands or chemicals. When reading, there should be plenty of light, preferably from the left rear; Correct posture and a distance between 30 cm and 40 cm.

2. When choosing reading materials, the font should be clear and not too small.

3. Watching TV must be 5 7 times the diagonal of the TV picture. Read a book for no more than one hour in a row. If you need glasses, you should be examined by a doctor and then dispensed with glasses.

Myopia surgery, whether it is lens surgery or laser surgery, can correct myopia and astigmatism at the same time, so you don't have to worry about astigmatism left after myopia surgery.

Let's talk about femtosecond surgery.

ReLEx surgery can remove myopia and astigmatism together, the correction range of myopia is within 1000 degrees, astigmatism within 600 degrees, and the specific need to go to the hospital for examination, I hope to help you, reference, southeast, ophthalmology.

Femtosecond laser excimer surgery is just one modality in excimer surgery. In other words, ordinary excimers use lamellar knife to make corneal flaps, and femtosecond laser excimer surgery uses femtosecond to make corneal flaps, which is the difference between them. Myopia 900 astigmatism 300, the visual acuity is within the basic range of excimer surgery, but whether the surgery can be done or not still needs to be done in detail, confirmed by the excimer doctor.

Under the guidance of the doctor, it is best to choose the surgical method that suits your own conditions, femtosecond is not a panacea, and it is not a must for excimer surgery. I wish you a speedy recovery of your good eyesight.

Femtosecond lasers can generally correct astigmatism, but the range of astigmatism it corrects is limited. Usually the astigmatism correction effect is better within 300 degrees, but the astigmatism correction effect of about 300-600 degrees varies from person to person. Usually femtosecond laser is divided into full femtosecond laser and half femtosecond laser, half femtosecond laser is a combination of excimer laser and femtosecond laser surgery, full femtosecond laser is the whole process of using femtosecond laser surgery.

Generally, the correction ability of femtosecond laser for astigmatism is relatively weak, and it can only correct regular astigmatism, and its correction ability is limited for irregular astigmatism of the cornea. However, femtosecond laser surgery can be personalized to be guided by corneal topography or wavefront aberrations to achieve irregular astigmatism or higher astigmatism in the cornea. Therefore, if the degree of astigmatism is relatively low, the full femtosecond surgery can be considered, and if the astigmatism is relatively high or the cornea is irregular, the half femtosecond personalized design correction surgery can be considered.

The astigmatism of the degree is still possible, but the height of the number cannot be done. Myopia surgery usually refers to excimer laser surgery. The excimer laser permanently applies the power of the frame lens to the cornea.

Therefore, there is a certain limit to the degree of correction. Generally, it cannot exceed 800 degrees. If it is above 800 degrees, the thickness of the cornea should be combined.

Myopia and astigmatism are collectively known as refractive errors. Astigmatism is when the eye is not round enough, and in general, astigmatism can only be achieved by wearing glasses**. However, in the process of laser correction, a part of the low-grade astigmatism can be removed, but the degree of astigmatism should not be too high, generally not more than 200 degrees.

Astigmatism alone is not possible, but the prescription is less than 1000 degrees, and you can know it by looking at the thickness of the cornea and checking the eyes.

Astigmatism is mainly related to the curvature of the cornea and the anterior surface of the lens.

In the emmetropic eye, the cornea is approximately hemispherical, and light rays are refracted on the anterior surface of the cornea and lens and focused on the retina. In the astigmatism eye, the cornea resembles a rugby ball (Figure 1), and the refraction changes, with multiple foci appearing in front of the retina (Figure 2).

Therefore, in the presence of astigmatism, it is blurry whether it is seen near or far.

Astigmatism is another variable refractive state.

Any factor that alters the refractive interface between the cornea and the lens: extraocular muscle tone, eyelid pressure on the eyeball, accommodative force, tear film thickness, corneal topography, pupil size, will affect the astigmatism of the eyeball.

Moreover, the degree and axis position of astigmatism vary diurnal. For example, the cornea is relatively flat when it wakes up in the morning (it has been pressed by the eyelids overnight) and becomes a little steeper at night.

The degree of astigmatism in the infant.

The astigmatism is high in newborns and infants, and higher in preterm infants, inversely proportional to gestational age and weight at birth.

Babies at 3 months of age have astigmatism of more than 100 degrees, and by the age of 3 years, only 4% of children have astigmatism of more than 100 degrees (Mutti Do, 2004).

More than half of infants aged 0-5 months have astigmatism above 100 degrees, and even 10% have astigmatism above 300 degrees (Gwiazda J, 1984).

Infants aged 6 to 12 months have three times the rate of astigmatism compared with children aged 5 to 6 years (McKean-Coudin R, 2011).

So, if parents notice that their little ones have large astigmatism, don't be afraid.

As long as there is no myopia, it is normal for small babies with 100-200 degrees of farsightedness and astigmatism above 100 degrees.

Changes in astigmatism at 1-4 years of age.

Most of the children under the age of 2 have astigmatism, and most of them are 100-200 degrees;

Between the ages of 2 and 4 years, the number of children with astigmatism does not exceed 30%, and it is becoming less and less, and the degree is still mostly 100-200 degrees (Gwiazda J, 1984).

Someone followed a 1-year-old child with astigmatism of more than 100 degrees until the age of 4, and gave the children a dilated eye refraction every year. It was found that the children did not reduce the degree of farsightedness, but the prevalence and number of astigmatism were significantly reduced, and there was a significant reduction in both 1 and 2 years of age (Abrahamsson M, 1988).

Therefore, the fluctuation of astigmatism in infants and young children is actually a unique process of eye maturation, which is related to the toric changes on the anterior surface of the cornea and lens, and the degree of astigmatism decreases with age (Mutti Do, 2004).

Asian children are more likely to be nearsighted, and white children are more farsighted.

After talking about the results of the study of foreign children, we looked at the data of Chinese children, so that we could understand the changes in our children's eyes.

Astigmatism can be performed with femtosecond laser surgery. [10s to test which correction plan is suitable for me].

Astigmatism is a common ophthalmic disease and is a type of refractive error, usually due to congenital developmental abnormalities caused by genetic factors, or unhealthy eye habits, such as squinting for a long time. It is due to the difference in the refractive force of the cornea in the vertical and horizontal directions, so that the light rays are refracted through the cornea and cannot form a focal point after entering the eyeball, but forms a focal line, causing the projection of the scenery on the retina to become blurred, resulting in vision loss. The corneal refractive power defect can be repaired with a femtosecond laser procedure, so that the light rays can be refracted through the cornea and focus on the retina in the eye, so that vision can be improved.

If you want to know more about ReLEx surgery, we recommend consulting Beijing Ming Optometry Ophthalmology. All laser equipment of Beijing Mingshi Ophthalmology has its own technical parameters and functional advantages, and 7 sets of laser surgery equipment provide strong technical support for personalized surgical methods through collocation and strong combination. Assisted by the use of corneal topography wavefront aberration and corneal topography transformation aberration, a total of three excimer cutting guidance technologies, truly for each patient to achieve private customization of myopia surgery, the technology won the hearts of the people, won the praise of patients.

The methods of femtosecond myopia mainly include full femtosecond surgery and half femtosecond surgery, and the advantages and disadvantages of each ** are mainly analyzed as follows:

1. ReLEx surgery: It is done completely by using femtosecond laser, which uses femtosecond laser to perform a second scan between the corneal layers to form a lens, and then the lens is taken out through a micro-incision, so as to achieve the purpose of correcting refractive error. The biggest feature of ReLEx laser surgery is that there is no need to make a corneal flap, there is no need to worry about the risk of corneal flap displacement, and the biomechanical changes of ReLEx laser surgery are less than that of femtosecond surgery and excimer laser surgery.

Therefore, ReLEx surgery is safer than other surgeries, the postoperative recovery time is shorter, and the corneal nerve is less damaged, and the probability of dry eye syndrome after surgery is lower, and ReLEx surgery is suitable for patients with myopia below 800 degrees.

2. Half femtosecond surgery: corneal flap is made by femtosecond laser, and then excimer laser is used to cut the corneal tissue to achieve the purpose of correcting myopia, the biggest advantage is that it can be accurately corrected according to the patient's degree, astigmatism, axis position, etc., and the half femtosecond surgery has a wider correction range than full femtosecond surgery, and is generally suitable for myopia below 1000 degrees.

It should be noted: 1. Pay attention to the time you use your eyes.

Children's eye development is not perfect, the ability to work is low, every time you read or write for an hour, you should let the child go to outdoor activities, do games, look into the distance, or observe the flowers and trees, so that the tense eye muscles are relaxed, eliminate fatigue. In addition, it is necessary to make the child's life regular, have enough sleep, and let the eyes get enough rest.

2. Pay attention to the light of your eyes.

Do not allow your child to read or write in dark light or sunlight. If a 25-watt light bulb is used indoors at night, the distance between the book and the bulb should be within 1 meter. If you use a 60-watt bulb on a stool, the distance between the book and the bulb should be 1 2 meters.

Cloudy days, dusk, weak light in the moonlight, and strong light in the sun are not suitable for reading and writing. When watching TV, it is necessary to maintain a suitable distance, which should generally be 5 7 times the diagonal length of the phosphor screen. The time to watch TV should not exceed 2 hours at a time.

3. Pay attention to eye exercise.

Physical exercise can enhance blood circulation and metabolism, supply more nutrients to the eyes, and enhance the resistance of the eyes, which is an indirect exercise for the eyes. The direct exercise is eye exercises, which is based on the massage, massage, acupuncture and acupuncture acupuncture points of Chinese medicine, combined with jujube Kuanhui medical sports, which is a scientific method to protect eyesight. Parents should learn the basic knowledge of eye exercises, give specific guidance and often urge their children to do eye exercises, and persevere.

4. Pay attention to eye nutrition.

In order to protect children's eyes, children can eat more carrots, animal liver, lean meat, to supplement vitamin A, or regularly supplement the comprehensive nutrition of the eyes with Leyan vision nutrients, and at the same time, it is also necessary to appropriately consume millet, tofu, animal liver and other supplements of vitamin B2, so as to avoid night blindness, corneal malacia, red eyes, dry itching and other symptoms. Eating too much sugar will harm your child's eyesight, so your child's sugar intake should be controlled.

5. Pay attention to regular inspections.

Regular check-ups are due to the fact that children's eye structure, binocular visual function, and intelligence are still in the process of continuous development after birth, and the content of the examination is different at different ages. The usual age of ophthalmologic examination is generally 2-7 days after birth, 42 days after birth, 3 months, 6 months, and 1 year of age, and then once a year. In this way, the problem can be detected early and corrected early, instead of waiting until the vision has deteriorated and there is a vision problem before going for a check-up.

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If the eye has myopia and astigmatism, as long as it meets the indications for surgery, femtosecond laser surgery can often be performed, and now femtosecond laser surgery is divided into half femtosecond laser surgery and full femtosecond laser surgery, these surgical methods are very advanced, very mature, and the success rate is also very high, very small.

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