Can eye fatigue cause nearsightedness?

Written by Wang Fang
Ophthalmology
Updated on September 03, 2024
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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 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 Lian Wen Xi
Pediatrics
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Is a child's vision of 4.7 considered nearsighted?

Children's vision at 4.7 does require a comprehensive analysis to determine if they are nearsighted. Generally, a child with a vision of 4.7 is likely to be nearsighted, but this single parameter should not be used to diagnose myopia. It's necessary to differentiate whether the child has true myopia or false myopia. Additionally, the issue could be amblyopia, astigmatism, or farsightedness. Moreover, the child's age also plays a significant role in assessing vision. For instance, a vision of 4.7 might indicate nearsightedness in a child aged seven or eight, but for a child around three years old, a vision of 4.7 is considered normal. Parents are advised to take their child to the hospital for a dilated refraction test to ascertain the specific condition.

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Written by Hu Shu Fang
Ophthalmology
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What department should you visit for nearsightedness?

People with nearsightedness should visit the ophthalmology department, as it is a major type of refractive error in outpatient services. Nearsightedness means clarity when looking at close objects, but blurriness when viewing objects at a distance. Currently, nearsightedness in adolescents is a significant health issue in China. Patients with nearsightedness should see an ophthalmologist at a qualified hospital for eye examinations to rule out any eye diseases, and then wear prescription glasses with the correct diopters to prevent the progression of nearsightedness. Additionally, those with nearsightedness must regularly visit the doctor to check their eyes.

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Written by Li Zhen Dong
Ophthalmology
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The difference between nearsightedness and farsightedness.

Myopia is characterized by clear vision up close and blurred vision at a distance; hyperopia is characterized by clear vision at a distance and blurred vision up close. The main difference between myopia and hyperopia is the issue with the eye’s axial length. In an unaccommodated state, when parallel light rays enter the eye and focus in front of the retina, it is called myopia; when they focus behind the retina, it is called hyperopia. Myopic glasses are concave lenses, while hyperopic glasses are convex lenses. When myopia or hyperopia occurs, it is important to rest, reduce close-up activities, avoid eye fatigue, use eyes properly, eat a light diet, adjust your attitude, have regular check-ups, and pay attention to vision health.

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Written by Hu Shu Fang
Ophthalmology
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Can 600-degree acquired myopia be inherited?

A myopia of 600 degrees is considered high myopia, and it can be inherited by the next generation. Moreover, eyes with high myopia are prone to other complications at the back of the eye, such as retinal breaks, macular holes, and posterior staphyloma. Therefore, it is crucial to pay attention to high myopia and have regular check-ups. If both parents have high myopia, there is an 80% chance that their children will tend to be myopic. If one parent has high myopia, there is a 50% chance that their children will tend to be myopic. Even if neither parent is myopic, there is still about a 20% chance that their children will be myopic.