The magic anti-myopia pen

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There is a picture of the pen that I said yesterday .It's so magical that I can't help sharing it to you again. There is a 360-revolving electronic eye on the up of the pen.While writing, if the user don’t have the right sitting position or their distance between eyes and desk,the electronic eye will send the message to central processing unit and then the pen point will shrink until the students regain the right position.It can keep user far away from shortsighted and hunchback, we called it anti-myopia pen. It's a pity that I can't upload videos on this site. If I can you will feel the magic pen more accurately ! I like this pen very much. I hope the pen can help my children to correct thier sitting posture .