Read the following article and select the best answer. Article: June 6this National Eye Care Day. It is a good chance for us to improve our eye health. What are common eye problems we have today? How can we protect our eyes? Read on to find out the answer. Eyes are important in our everyday life. We use them to read books, see colors and view the wonders of the world. But sometimes, we use them too much and it hurts them. In the past, nearsightedness was a common eye problem among children. This is mostly because of their bad eye habits, such as watching TV too long and reading books in bed. However, today's technology is changing the way we live. Children spend more time working and playing in front of computers, smartphones and iPads. US children spend more than 42 hours a week in front of electronic screens , US' ABC news reported. This has caused a new problem for our eyes: digital eyestrain . People with digital eyestrain may get headaches, dry and red eyes, eye pain, watering and other eye problems. But don't worry. The following tips can help you protect your eyes. Try them out. Screen advice: 1. When you are watching electronic screens, keep them at least 30 cm from your eyes. Try not to use your smartphone in direct sunlight. 2. Blink more often when you are looking at the screen. This can help to stop dry eyes. 3. Remember to take a 20-20-20 break: every 20 minutes, take a 20-second break and look at something 20 feet (about 6 meters) away. 4. Spend less time in front of screens. One to two hours a day is OK for your eyes. Question: As people _ , digital eyestrain has become a new eye problem. - read books in bed and watch TV too long - spend too much time before electronic screens - eat too much junk food and smoke a lot - spend too little time doing sports outside
The answer to this question is:
spend too much time before electronic screens