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 Zheng Xin
Ophthalmology
51sec home-news-image

What lenses should be used for nearsightedness?

Myopia, or nearsightedness, refers to a refractive condition where, in a relaxed state of accommodation, parallel light rays are focused in front of the retina after passing through the eye's refractive system. Myopia is categorized by degree into mild myopia, which is less than or equal to 300 degrees, moderate myopia ranging from 325 to 600 degrees, and high myopia, which is over 600 degrees. Generally, the degree of myopia is within 600 degrees, and most patients do not exhibit any pathological changes in the fundus. They require the use of suitable concave lenses for correction. If the degree of myopia exceeds 600 degrees, a fundus examination is necessary. If there are no special changes in the fundus, correction can also be made using appropriate concave lenses.

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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.

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Written by Zheng Xin
Ophthalmology
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At what degree of myopia do you need to wear glasses?

Myopia is a refractive state in which, when the eye's accommodation is relaxed, parallel light rays from the outside, after passing through the eye's refractive system, focus in front of the retina, this condition is called myopia. The occurrence of myopia is influenced by a combination of various factors including genetics and environment. Common clinical symptoms of myopia include decreased vision, which also affects normal daily life. It is recommended to wear glasses regardless of the degree of myopia if it impacts daily activities.

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Written by Zheng Xin
Ophthalmology
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The difference between amblyopia and myopia.

Amblyopia refers to a condition where, through examination, the eyeball has no organic lesions, but the vision is poor. Even after correction, the vision remains significantly lower than normal, generally less than or equal to 0.8, without any organic lesions in the eyeball. In such cases, amblyopia can be considered. Myopia, on the other hand, refers to poor vision that can reach normal or better levels after correction. The difference between the two is that amblyopia cannot be fully corrected through adjustment, whereas myopia can be completely corrected. In terms of treatment, myopia can be corrected by wearing glasses or undergoing surgery, while amblyopia can only be managed by wearing glasses or undergoing specific amblyopia treatments.

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Written by Li Zhen Dong
Ophthalmology
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Does nearsightedness surgery require an incision?

There are two types of myopia surgery. One is performed using lasers, and the other involves making a small incision on the edge of the cornea to implant an artificial lens into the eye. Corneal laser surgery uses a laser to create a concave mirror on the cornea to resolve the symptoms of blurry vision when looking at distant objects. The ICL surgery, which involves the implantation of an artificial lens, significantly improves the patient's vision after the procedure. Both types of myopia surgeries are currently quite advanced in terms of technology. Therefore, patients who wish to stop wearing glasses and have clear indications from pre-operative examinations can consider undergoing myopia surgery treatment.