How is the surgery for nearsightedness?

Written by Zhou Qing
Ophthalmology
Updated on September 18, 2024
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The choice and design of myopia surgery methods need to be comprehensively considered based on factors such as the patient's preoperative examination results and postoperative vision requirements. Generally, patients can choose laser myopia surgery. If high visual acuity is needed due to study or work, or if there is high physical activity after surgery, it is recommended to choose a safer surgical option. This is because minimally invasive technology causes less trauma to the corneal nerves, which can more effectively improve postoperative night vision, greatly enhance visual quality, and better stabilize postoperative vision.

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Written by Huang Kun Mei
Pediatrics
1min 1sec home-news-image

Children's myopia lacks which trace elements?

The relationship between myopia in children and the lack of trace elements is not significant. Myopia is generally caused by several reasons: The first is hereditary factors, where one or both parents may have myopia. The second reason is poor eye habits in children, such as sitting too close to the desk while doing homework, or excessive use of the eyes, like watching TV or spending a long time on mobile phones, which can easily lead to myopia in children. Once a child develops myopia, the degree could increase by 50-100 degrees each year. Thus, if this is the case, it is necessary to conduct a timely dilated optometry for the child to confirm whether they can wear orthokeratology lenses. If the child is over eight years old and all conditions are suitable, orthokeratology lenses can be prescribed to control the progression of myopia.

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Written by Wang Fang
Ophthalmology
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Can eye fatigue cause nearsightedness?

Eye fatigue can exacerbate myopia, and it is an important factor in worsening nearsightedness. When the eyes look into the distance, they are in a completely relaxed state, which does not cause or worsen myopia. Myopia occurs due to near-distance eye activities. Prolonged close-distance eye activities and working too closely can lead to chronic fatigue in the external eye muscles. When this happens, the eye axis is stretched and, over time, cannot fully return to its original state, resulting in the onset or worsening of myopia. Therefore, during daily eye use, it is essential to avoid excessive duration and too close distances to prevent fatigue and thus avoid worsening myopia.

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Written by Deng Jiang Tao
Ophthalmology
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Where is the incision made for nearsightedness surgery?

Firstly, myopia surgery essentially involves thinning the cornea by cutting it, which is like transferring the degree of myopia onto the cornea itself. Let's first talk about the layering of the cornea. From front to back, the cornea is divided into five layers, generally consisting of the epithelial layer, anterior elastic layer, stromal layer, posterior elastic layer, and the corneal endothelial layer. Among these layers, the stromal layer is the thickest, about 500 microns, accounting for over 90% of the total corneal thickness. Therefore, during myopia surgery, the main area of cutting is in the stromal layer of the cornea.

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Written by Li Zhen Dong
Ophthalmology
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Why can't true myopia be reversed?

True myopia is mainly characterized by the elongation of the eyeball, and the current medical level cannot solve the problem of eyeball elongation. Therefore, its nature cannot be changed, which means it cannot be reversed. Present treatment methods can only alleviate the symptoms of blurred vision when viewing distant objects in myopic patients, but cannot resolve the fundamental nature of myopia. Current treatment options include prescription glasses, orthokeratology lenses, contact lenses, and surgical treatments. Surgical options include corneal laser surgery and ICL (implantable collamer lens) surgery. After the onset of myopia, it is important to rest and use the eyes correctly to prevent further progression of the condition.

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Written by Deng Jiang Tao
Ophthalmology
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Does myopia correction rebound?

Will there be a rebound after myopia correction surgery? Generally, it relates to two aspects. The first is associated with your pre-surgery degree of myopia; the second relates to your habits in using your eyes after the surgery. Generally speaking, the higher the degree of myopia before the surgery, the more likely a rebound will occur. Roughly speaking, if your degree of myopia was above 700 degrees before the surgery, there's about a 20% to 30% chance of rebounding. However, a rebound does not mean it will return to the previous degree of over 700; typically, it might rebound by around 100 to 200 degrees. The second aspect is significantly related to your post-surgery visual habits. If, after the surgery, you frequently use computers, read documents, or use your phone, there’s a higher chance of experiencing some degree of rebound. Conversely, if your screen time is less, the proportion of myopia rebound tends to be smaller.