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Guarding the health of the eyes for a Healthy China
Cherishing the 'visual' world, guarding the window of the soul - comprehensive eye health science popularization
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Published Time:
2025-04-22
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In today's society, with the widespread use of electronics in learning, entertainment, and work, excessive eye strain has become a common problem for the general public. According to statistics from the China Ophthalmology Network, nearly 30% of the national population is nearsighted, with the rate in cities as high as 33%. The percentage of elementary school students wearing glasses is 30%, middle school students 50%, and university students a staggering 75%. The total number of nearsighted individuals in China is a high 360 million, the highest in the world.
Understanding the Importance of Our Eyes
Our eyes allow us to see the beauty of the world. Light passes through structures like the eye's lens, projecting an image onto the retina, much like a photograph. This image is then converted into signals transmitted to the brain's visual cortex. While this process seems simple, it is actually complex and intricate. Therefore, any factor affecting light transmission and signal conversion can impact our vision.
Eye Usage Habits and Eye Care Knowledge
1. Reasonably Control the Use of Electronic Devices
In today's society, electronic devices have become an indispensable part of our lives. However, prolonged use can put a significant strain on our eyes. Therefore, controlling usage time is crucial. For studying, single sessions should not exceed 25 minutes; for entertainment, no more than 15 minutes. Daily cumulative use should not exceed two hours, and for minors, it should be limited to one hour. When using electronic devices, the center of the screen should be at eye level or slightly below to reduce eye strain.
2. Choose the Right Screen
When attending online classes, prioritize larger screens. The order of screen size preference is: projector, television, computer, tablet, and finally, phone. Larger screens provide a wider field of view, reducing eye strain.
3. Pay Attention to Lighting and Reflections
Lighting significantly impacts the eyes. Both too weak and too strong light can harm them. Therefore, maintain adequate and comfortable lighting, avoiding reflections. A desk lamp is recommended to reduce glare. When using electronic devices at night, turn on a light and dim the screen brightness appropriately.
4. Maintain Correct Posture and Reading Position
Posture directly affects eye health. When reading or writing, adopt the "one foot, one inch, one fist" rule: eyes one foot from the book, body one fist away from the desk, and fingers holding the pen at one inch. Maintain a reading distance of approximately 30 centimeters.
5. Follow the "20-20-20" Rule
After 20 minutes of close-up work, look at something 20 feet (approximately 6 meters) away for at least 20 seconds. This rule effectively relieves eye strain and prevents nearsightedness.
6. Outdoor Activities and Exercise
Regular outdoor activities and exercise provide "eye baths" of green spaces, relax the ciliary body and other eye muscles, protect vision, and prevent nearsightedness. At least two hours of daily outdoor activity is one of the most effective ways to reduce and control nearsightedness.
7. Eye Exams and Scientific Correction
Schedule 1-2 eye exams annually to detect and correct vision problems early. If vision deteriorates, seek medical attention promptly and follow the doctor's advice for correction.
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