Answer: Excimer laser myopia treatment surgery has a very high success rate, and the range of corrected myopia is quite large, myopia up to 3,000 degrees, astigmatism up to 600 degrees, and farsightedness up to 800 degrees, and there is no need to wear glasses after the surgery. Since the first excimer myopia surgery was performed in the United States in 1987, it has been more than 10 years since then, and the statistics of the cases during this period show that there is no adverse effect after excimer laser surgery, and the degree of correction is also very stable.
It seems that every eye hospital in a big city can do it, and the price ranges from 1,000 to 3,000 according to the size of the hospital
1, what is the excimer laser? The first thing I'd like to say is that I'm not sure if it's a good idea to use it. Laser treatment of myopia will not have sequelae?
A: Excimer laser is a fluorine-argon gas mixture produced by the excitation of an invisible ultraviolet beam, belonging to the cold laser, can accurately ablate the cornea is expected to remove part of the damage to the surrounding tissues and other tissues and organs. The excimer laser has a very short wavelength of 193nm (nanometers), which does not penetrate into the eye and therefore has no adverse side effects on the internal tissues of the eye. There is also no reason for after-effects to recur after a number of years of treatment.
Torn between glasses and surgery .....
Is it better to continue to wear eyeglasses or to get rid of the "burden" of surgery?
2. How does excimer laser correct refractive errors? How long does the surgery take?
Answer: Excimer laser corrects myopia, astigmatism and hyperopia by changing the curvature of the cornea so that light rays are focused on the retina, thus regaining a clear naked vision. The entire excimer laser surgery process for both eyes takes about 10 minutes or so (excluding the time for sterilization and preparation).
3. What is the difference between PRK and LASIK surgery?
Answer:PRK is the abbreviation of excimer laser corneal surface cutting, the method is to remove the corneal epidermis, and then use the laser to ablate the corneal tissue that is expected to be removed, and then the corneal epidermis regenerates and heals in three days, and the vision is gradually restored. After PRK treatment, there is a foreign body sensation, tearing, pain, etc. The symptoms disappear after 2-3 days, and eye drops are required for a few months as prescribed by the doctor. Excimer laser in situ keratomileusis or LASIK for short, the method is to make a corneal flap with a tip with a corneal laminar knife, and then ablate the parenchymal layer under the flap with an excimer laser, and then reset the corneal flap. LASIK is a refractive error correction developed on the basis of PRK, its design is more reasonable and more in line with the anatomical and physiological characteristics of the human cornea, postoperative visual acuity recovery is faster and more stable, LASIK eyes only mild discomfort after surgery, 1 day after the discomfort is eliminated, regular review a few times, without hospitalization is the most perfect myopic correction surgery.
4, excimer laser myopia treatment surgery can correct how many degrees? Can I not wear glasses after the surgery? Will the myopia go back up in the future?
A: The success rate of excimer laser myopia treatment surgery is very high, and the range of corrected myopia is quite large, with myopia of up to 3,000 degrees, astigmatism of up to 600 degrees, and hyperopia of up to 800 degrees, and there is no need to wear eyeglasses after the surgery. Since the first case of excimer myopia surgery was performed in the United States in 1987, it has been more than ten years since then, and the statistical results of the cases during this period show that there are no adverse effects after excimer laser surgery, and the degree of correction is also very stable.
5, excimer laser treatment of myopia is not dangerous?
Answer: There is no danger, because it is operated in the front part of the cornea, there is no harm to the corneal endothelial cells, and there is no scar tissue left in the cornea after the operation. Therefore, after a long period of strict examination, the U.S. Food and Drug Administration (FDA) has already passed the excimer laser surgery and confirmed that this operation is safe and has excellent results.
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6. How long will it take for my vision to be corrected after treatment?
Answer: In about 3-4 hours, there will be a significant improvement in vision, and generally the next day after the surgery, vision can reach or approach the corrected visual acuity. It takes 1-3 months for the vision to stabilize, and it is normal for the vision to fluctuate slightly during the 3-month period.
7. What is the effect of laser treatment? Is the effect stable?
A: So far, the results of domestic and international treatments have been satisfactory, and the heavy myopia glasses can be removed once and for all. The naked eye vision after treatment is generally able to reach or close to the corrected vision with glasses before treatment. Years of theory and practice have proven that myopia will not return after treatment if the myopia is stabilized and the anterior and posterior diameters of the eyeballs are no longer lengthened before treatment. This marvelous laser makes the flattened part of the front surface of the eyeball will not regenerate and become convex again, so the treatment effect is stable and permanent.
8. Can all myopic people receive excimer laser refractive surgery?
A: This surgery has systemic and ocular contraindications, such as scarring and immune diseases, etc. people should not do this surgery, because such people are prone to corneal haze and refractive regression. There are also ocular contraindications, such as conical cornea, dry eye disease, and cornea that is too thin. Despite the systemic and ocular contraindications, the vast majority can be done.
9. What procedures do I need to go through to receive laser treatment?
A: After a detailed eye examination (about 1 hour), an appointment is made for registration, eye medication is dispensed 3 days before the surgery, and the treatment is performed at the scheduled time.
10. What are the possible reactions after treatment?
A: After the treatment, perhaps there will be mild foreign body sensation, tearing, photophobia and other symptoms, usually lasts for 3-4 hours, the discomfort disappears the next day.
11. Can both eyes be operated at the same time?
A: Yes. The vast majority of excimer laser surgeries are performed on both eyes at the same time to avoid the trouble of unequal vision.
12. How long does it take for the treatment process after excimer myopia laser treatment surgery?
Answer: After surgery, eye drops usually take one month, and you can go to work and study one day later.
13, how to choose a safe and secure, excimer laser treatment myopia professional medical service center?
Answer: There should be experienced professional physicians; advanced and reliable professional equipment; complete and true health education consultation; careful and correct surgical evaluation; ophthalmology-specific dust-free and sterile surgical space.
14: What should I pay attention to before surgery?
A: Keep your eyes in the best condition for better surgery. Generally speaking, don't stay up all night before surgery, relax your mood, stop wearing contact lenses, gaze point training, and preventive anti-inflammatory drops.
15. What kind of anesthesia is used during the surgery? Will the surgery hurt?
Answer: Only anesthetic eye drops are needed for the eyes, and the surgery will not be painful.
16: How do I take care of my eyes after treatment?
A: It is necessary to pay attention to: 1, one month can not swim. 2, one week eyes can not make up, can not rub the eyes. 3、Wash your hair and take a bath carefully within a week, do not let water and soap into the eyes. 4. Do not drive an automobile if you do not have clear vision. 5. Use eye drops as directed by your physician. 6. Follow the instructions for regular follow-ups.
17. When can I drive after laser surgery?
Answer: Generally, you can drive a car when your vision recovers after the surgery, but you should consider your own safety and the safety of others, and decide according to your own vision condition.
18: I have had other myopia surgeries, but I am not satisfied, can I receive excimer laser treatment?
A: Yes. However, the decision has to be made after examination by a physician.
19. Can I have excimer laser even if I am presbyopic?
A: Yes. Presbyopia is a kind of degeneration of the ability to adjust focus, people to presbyopia age of myopia to see the distance is always difficult to see, some people are more trouble need to wear two pairs of glasses, see a pair of far, see a pair of near, if you accept myopia excimer laser treatment can be less a pair of glasses to see the distance, but close reading still need to wear presbyopia glasses. If you look close do not want to wear presbyopia glasses can be communicated with the physician before the surgery, leaving a number of degrees of myopia in order to reduce the degree of presbyopia.
20, laser myopia treatment is safe?
Answer: the answer is yes. the excimer laser used in LASIK surgery is a fluorine-argon gas mixture produced by the excitation of an invisible ultraviolet beam, the wavelength of 193 nm. it is a kind of light wave that can be accurately focused and controlled, and each laser pulse irradiated to the tissues can make the tissue molecules vaporized, so it is a very high precision of cutting, very accurate, and each light pulse cutting depth is 0.2mm, and the cutting depth is 0.2mm, and the cutting depth is 0.2mm. The cutting depth of each light pulse is 0.2um, and it is able to carve all kinds of patterns on the human hair strand. The thickness of the human cornea is about 500-600um, which is about the thickness of five hairs. Because it is a cold light source, it has no thermal effect on the irradiated tissues. By relying on this accurate vaporization, the cornea can be precisely vaporized off a layer, but there is no adverse effect on the structure of the cornea.
21, excimer laser will not burn the cornea?
A: Excimer laser is a very short wavelength of ultraviolet light, which occurs with the biological tissue is a photochemical effect rather than a thermal effect, so there will be no thermal damage, let alone burning.
22, laser may harm other parts of the eye?
A: Today's best excimer laser equipment is equipped with infrared eye three-dimensional active tracking system, when your eye deflection beyond the normal range, the laser will automatically stop radiating to ensure safe treatment.
23, laser treatment of myopia will go back? I am a myopic patient, 20 years old, the current right eye degree of 650 °, the left eye 575 °, wearing glasses is very inconvenient, I know that now the laser can treat myopia, I worry that after the cure will rebound. I don't know if this is true.
Answer: This is a common question, and many myopic patients have mentioned the same or similar problems. The process we currently refer to as laser treatment for myopia is done by sculpting the cornea at the very front of the eye. This part of the corneal tissue used for treatment has no regenerative capacity, unlike other tissues in our body such as hair, which has the ability to regenerate. It has been proved in theory and practice for many years that the part of the front surface of the eye flattened by this marvelous excimer laser will not regenerate and become convex again, so the effect of the treatment is very stable and will not rebound again. If the myopia has stabilized in recent years and the front and back of the eyeballs do not lengthen, myopia will not reappear after the treatment. 1987, the world's first patient to undergo excimer laser treatment in the United States had a visual acuity of 1.0 after the operation, and still maintains the best visual acuity to this day. The U.S. Food and Drug Administration (FDA) has approved excimer laser correction after a long and rigorous review, and has confirmed that the procedure is safe, stable and highly effective.
24. Can I regain my 5.0 vision after laser myopia? I'm a senior in high school and I'm 19 years old. I grew up with the ambition to be a wise and courageous public security police, therefore, usually I pay great attention to the protection of eyesight, due to the current study task is very tense, my eyes are still myopia, now both eyesight is 4.6, to the hospital after examination the doctor said I myopia 175 degrees. I would like to ask if I can regain more than 5.0 vision after laser treatment?
A: After laser treatment you can regain your vision above 5.0. Myopia can be categorized into low, medium, high and ultra-high myopia according to the degree of myopia. Generally 100-300 degrees is called low myopia, 300-600 degrees is called medium myopia, more than 600 degrees is called high myopia, and more than 1,200 degrees of myopia we usually think of as ultra-high myopia. This student has 175 diopters, which is low myopia and is also seen as simple myopia. In low myopia (simple myopia), serious pathologic changes in the retina of the eye are rare, and the retina tends to function better, and the corrected visual acuity with lenses is more desirable, usually reaching a corrected visual acuity of 5.0 or higher. And the effect of laser treatment of myopia is generally to achieve or close to the best corrected visual acuity with lenses (e.g., if the best visual acuity with lenses is usually 5.0 or more, the naked eye visual acuity after the treatment is usually restored to 5.0 or more).
25. Contact lenses have inflamed my cornea, can I still receive myopic laser treatment? I am a myopic patient, 36 years old, and have been wearing contact lenses for nearly 20 years. Recently, my eyes are often red, dry, and have a feeling like sand grinding. After going to the hospital for examination, the ophthalmologist said that my corneal inflammation is very serious, and I will never be allowed to wear contact lenses again in the future. However, I am a lady who loves to look beautiful and I am engaged in a profession that deals with people, so I don't want to wear heavy frames. I would like to ask, can people like me still receive laser treatment? (My myopia: 750 degrees in my right eye; 875 degrees in my left eye.) I am very anxious, can you give me an answer as soon as possible?
A: After keratitis is cured, you can receive myopic laser treatment! Contact lenses are generally categorized into soft lenses and hard lenses, and what we normally refer to as contact lenses often refers to soft lenses. Your case is often seen in our ophthalmology department. Most of them wear contact lenses for a long time and cause different degrees of corneal inflammation, which varies from person to person, and the time is generally 3-20 years. After examination, we found that: the corneal surface neovascularization implantation, corneal epithelium punctiform detachment; the corneal epithelium of the severe case of large-scale detachment, erosion, corneal stromal layer edema, clouding, and cause serious intraocular inflammation. We even found that individual patients have rare and extremely large neovascularization in the deep stromal layer of the cornea, and once these neovascularizations rupture, the consequences are unimaginable. In addition, clinical data at home and abroad confirm that long-term contact lens wear can not only make the front surface of the cornea become rough, but also make the entire cornea thickness thin, and even cause the number of corneal endothelium significantly reduced. Therefore, contact lenses should be worn under the proper guidance of professional ophthalmologists, and regular checkups should be conducted so that problems can be handled and contact lenses can be discontinued in a timely manner. This lady can first come to our Excimer Laser Center of Wah Tak Eye Hospital, so that our experts can conduct a detailed and comprehensive examination for you. First of all, we will treat your corneal inflammation. After the treatment, the cornea will be healed after the inflammation is controlled, and after the expert's examination and approval, the examination, appointment and treatment of myopia laser surgery can be carried out. May you be free from myopia and embrace life soon!