excimer laser surgery

Excimer laser myopia treatment surgery is excimer laser surgery. Excimer laser surgery is the use of excimer laser to perform refractive cutting on the substratum of the corneal flap, thereby reducing the corneal curvature in the pupil area and achieving the purpose of correcting myopia (commonly speaking, the cornea is regarded as a transparent material, through cutting Made a pair of lenses). Treating diseases: myopia Indication Patients with refractive errors such as myopia, hyperopia, and astigmatism are not suitable for LASIK. Only patients with the following three conditions are eligible for LASIK: 1, age 18 years and older 2. The refractive status is relatively stable in the past two years (no significant change in degrees) 3, after examination without LASIK contraindications such as active inflammation in the eye, such as acute conjunctivitis, keratitis, etc.; suffering from keratoconus, glaucoma, severe dry eye, etc.; correction of severe amblyopia patients with poor vision; scar physique, Diabetes, collagen disease; exophthalmia, eyelid regurgitation; one-eyed patients. Contraindications 1, there are active inflammation in the eye, such as acute conjunctivitis, keratitis and so on. 2, suffering from keratoconus, glaucoma, severe dry eye syndrome. 3. Correcting patients with severe amblyopia with poor vision. 4, scar constitution, diabetes, collagen disease; exophthalmia, eyelid closure. Preoperative preparation (1) Vision examination: including naked eye vision and wearing glasses to best correct vision; (2) Refractive examination: including computer optometry, dilated optometry and re-examination. Whether the optometry is correct or not directly affects the surgical results; (3) Anterior segment and fundus examination: focus on the corneal transparency, whether the cornea has scars, whether the crystal is turbid, whether the fundus is opaque or fundus lesions; (4) Intraocular pressure test: to eliminate the possibility of high intraocular pressure and glaucoma; (5) Corneal thickness measurement: For patients whose corneal center thickness is less than 500m, if the patient is highly myopic, the thickness of the corneal center should be noted, and the patient should be informed before surgery; (6) Corneal topographic examination: The main purpose is to understand the regularity and symmetry of the entire corneal surface, and to eliminate various abnormal factors. Surgical procedure 1. Anesthesia eye. At the beginning of the operation, anesthetize the eye drops first. Use a special anesthetic to drip on the eyeball, let it lose pain, but the touch will still exist. 2, the corneal flap. First, the device is used to help the patient blink during the entire laser treatment of myopia surgery. Then the doctor put a suction ring on the opened eyeball to make the corneal flap. The process is only a few seconds, and the patient may feel pressure on the eye, or short-sighted vision, darkness and some pain. 3, laser carving. After the corneal flap was made, the doctor gently opened the corneal flap with a triangular sponge and used the laser to perform the engraving on the cornea according to the data of the laser instrument. The cutting area with a deep degree of myopia is correspondingly larger and takes a little longer. There will be a string of light and a little burning odor, the patient does not have to worry, this is a normal photochemical reaction when the laser works. Also note that although the laser can track the subtle activity of the eyeball in 1/10 second, it is best to keep an eye on it as required by the doctor. After the carving, the doctor covered the corneal flap with a sponge and rinsed the eyes. The operation of such an eye is done, and then the same step is used to make the other eye. 4. The operation is completed. The doctor will use a slit lamp microscope to examine the flap restoration.

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