In modern society, computers have become an essential part of our lives. They bring us great convenience in work, study, and entertainment. However, the question of whether computers are harmful has also drawn people's attention.

On one hand, excessive use of computers can cause various health problems. Staring at the screen for long periods may lead to eye fatigue, dry eyes, and even myopia. Poor posture while using a computer can cause neck and back pain. Additionally, being sedentary in front of the computer for a long time is not good for physical health, increasing the risk of obesity and other diseases.

On the other hand, computers can have a negative impact on mental health. Excessive immersion in virtual worlds on the computer may make people become isolated from real-life social interactions. It can also cause addiction, affecting people's normal work, study, and sleep patterns. Moreover, the information overload on the Internet can sometimes cause stress and anxiety.

However, it's not fair to simply label computers as completely harmful. When used properly, computers are powerful tools. They can help us access a vast amount of knowledge, improve work efficiency, and enhance communication. We just need to be aware of the potential problems and take appropriate measures to mitigate them, such as maintaining good usage habits, taking regular breaks, and using eye protection devices. In conclusion, the key lies in how we use computers rather than the computers themselves being inherently harmful.