5 simple tips to prevent eye diseases when studying online

The Covid-19 epidemic is changing cultural and educational activities globally, and online learning is becoming more and more popular. Overexposure to electronic screens will negatively affect health, including eyesight. Here are some measures that can help protect your eyes while studying online.

• Sit with correct posture

The habit of sitting in the wrong position for a long time will cause you to have unwanted health-related problems. Many scientific studies have shown that people who sit for too long in front of a computer screen can have vision loss, headaches, and even lead to bone and joint damage such as back pain, shoulder pain, numbness loss of appetite leading to skipping meals.

To sit properly, you need your head and back to be straight, not leaning or stooping, shoulders down, legs slightly extended, creating an angle between shins and thighs about 90-130 degrees, upper body and thighs creating an opening angle of 90-120 degrees, preferably 100-110 degrees because this position reduces pressure on the spinal discs and reduces adverse effects on the spine.

• Place the monitor in the correct position

What is the safe distance between eyes and computer screen? If you have to work and study with a computer for many hours, knowing a safe distance will help you avoid eye diseases.

According to the Canadian Center for Occupational Safety and Health (CCOHS), the appropriate screen height criterion is that the top edge of the monitor is horizontal or below the line of sight, the angle created by the line of sight and the center of the screen when the eye is looking straight ahead is about 15 degrees, the angle made by the bottom edge of the computer screen and the line of sight looking straight is about 30 degrees. The distance from the eye to the computer screen is 40-74cm, which can be estimated as the length of an adult arm.

• Proper rest

Focusing the eyes for a long time can easily cause dry eye syndrome and eye fatigue. Children often have symptoms of sore eyes, itchy eyes, watery eyes, sometimes even blurred, looking at one but two or three pictures. For online learning by mobile phone, the harm level may be more because of its small size.

To temporarily overcome the damage to the eyes when studying online, the main thing is to give the eyes a proper rest in between study periods. Give your eyes a 20-second break every 20 minutes, either by closing your eyes for a few seconds or looking into the distance. Should blink 15-20 times/minute, doing so will help spread tears evenly on the surface of the eyeball, making the eyeball always wet evenly.

• Lighting conditions

Lighting conditions that the surrounding environments are too dark will affect the eyes, first leading to fatigue quickly and then causing visual disorders. If the lights are too bright, it will be difficult for you to use the screen to study because it is obscured by light, causing glare.

It is also recommended to adjust the screen brightness and contrast so that the fonts and images on the screen are most visible, but the screen brightness should not be too high to lead to glare and eye pain.

• Nutritional supplements

It is recommended to supplement foods that contain a lot of vitamins A, B, C, D, E and trace elements such as zinc to help brighten the eyes. For example, vitamin A in red vegetables and fruits such as carrots and tomatoes; vitamin C is abundant in oranges, lemons, and guava; B vitamins in chicken, salmon, eggs, milk, beans, cauliflower …

Special tips:

Use eye drops: After a tiring day at work, eye drops should be used to help keep your eyes healthy. Close your eyes and relax. Eyes need to be hydrated as well as remove mucus on the eyes.

Source: https://vnexpress.net/cach-bao-ve-doi-mat-tre-khi-hoc-online-4360944.html