"Our children always say that they can't see clearly, is this myopia?"
I believe that many parents have such questions.
In fact, it is not necessarily myopia that cannot be seen clearly, but it may also be: hyperopia, astigmatism, excessive regulation and other reasons caused by pseudomyopia.
Today let Xiaobian take you to learn more about what myopia is and how to prevent it!
01
Analyze by looking at the state of objects near and far, and make simple distinctions.
Myopia: Generally, the vision of the near place is normal, mainly manifested in the loss of vision when looking at the distance, resulting in unclear viewing of distant objects.
Farsightedness: It is not clear when looking at the distance and the near place, and it is more serious when looking at the near place.
Astigmatism: looking at distant and near objects are not clear, there will be an aperture around when looking at objects that reflect light in the distance, and in severe cases, there will be ghosting or visual deformation, and there is often a squinting habit;
Overregulation: due to the continuous contraction and spasm of the ciliary muscle caused by excessive use of the eye, the thickness of the lens increases, resulting in blurred vision, and symptoms may be relieved after rest.
02
So what exactly is myopia? How can we prevent it?
1. Definitions
Myopia refers to the state in which the directional light emitted from infinity is adjusted to pass through the refractive system of the eye and then focus in front of the retina. Generally due to the corneal curvature is too steep or the eye axis is too long, the continuous growth of the eye axis will also make the degree continue to develop, and both are irreversible.
2. Factors of myopia occurrence and development
At present, scientists generally believe that the occurrence and development of myopia are determined by genetic factors and environmental factors.
If both parents are highly myopic, the incidence of myopia is higher than if one parent is highly myopic or both are low-degree myopia;
The occurrence of myopia is related to race, with the lowest black race, followed by the white race, and the yellow race is the highest;
Associated with the birth season, children born in summer are more likely to be myopic than children born in winter;
Close-up eye time, lighting, seat height, eating habits, physique, time and frequency of outdoor activities are all related to the occurrence and development of myopia.
3. To prevent myopia, what should we do in life?
Maintain the correct posture when reading and writing, and achieve "four ones";
Get enough sleep and spend time outdoors in plenty of sunlight;
Reduce the use of electronic products: no more than 20 minutes per use, no more than 1 hour a day;
Remember the "20-20-20" mantra: look at the screen for 20 minutes, look up at the distance of 20 feet, that is, 6 meters away for more than 20 seconds;
Abide by the principle of "rather big than small" of electronic products: selection order: projection, TV, computer, tablet, mobile phone;
Ambient light should be suitable: when using electronic products at night, you need to turn on the lights and dim the brightness of the screen to 30%;
Balanced nutrition, eat more vegetables and fruits; eat less sweets, fried foods, drink less carbonated drinks, etc.;
Regular check-ups: Parents should regularly take their children for eye health checks to establish a complete visual profile for their children.
If children and adolescents have decreased vision and blurred vision, it is recommended that parents take their children to formal institutions for detailed examination, and carry out personalized treatment according to the examination results, so as to achieve early detection and early intervention.
Contributed by: Chen Xin, Publicity Group
The right belongs to the Optometry Center of Tianjin Eye Hospital
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Editor-in-Chief: Li Lihua
Editor-in-charge: Zhang Wei
Editors: Quan He, Yuan Shuyi, Wang Weifang