If prolonged viewing of display screen is needed, it is better for you to view distant object or do some exercise for visual comfort periodically in order to alleviate eyestrain.

• 如要长时间使用电脑屏幕，应间歇远望景物或做一些眼部运动，如转动眼球，来使眼睛轻松，纾缓眼睛疲劳的问题。