最近某眼科医院对你校学生进行了视力调查，70%以上的同学都或多或少存在视力问题。假如你是李华，校学生会主席，为了引起同学们的重视，请你代表学生会以"Saving Eyesight"为主题写一封英文倡议书。要点如下：
1.倡议书的原因和目的。
2.倡议书的具体内容。
3.发出倡议。
注意：
1.词数80字左右；
2.可适当添加细节，以使行文连贯。
Dear schoolmates，
______

【考点】提纲作文．

【答案】Dear schoolmates，
  Recently，an eye survey on the students in our school conducted by an eye hospital shows that more than 70% of the students have vision problems more or less.On behalf of the Student Union，I call on every student to take measures to save our eyesight.
  First of all，we should reduce the time spent watching mobile phones and computers，which is the main cause of our poor eyesight.In addition，we can take regular breaks from our study and go outside to give our eyes a chance to be exposed to sunlight.Eventually，we should also keep it in mind that proper lighting is a must so that our eyes don't need to work hard.
   I strongly advocate that we should take action at no time to save our eyesight.