头痛恶心眼胀 近距离看3D片后果惨烈

　　In one experiment, researchers at Eindhoven University in the Netherlands asked 39 people who could see 3D to read some text on a screen from 10 feet away. Seven of the group suffered symptoms that can lead to nausea, including double vision and eye strain, this week’s New Scientist reports. Earlier this year The Royal College of Opthalmologists, Association of Optometrists and opticians said more research was needed in to the long term effects of 3D TV, but conceded short term effects were visible.

　　来自Eindhoven 大学的研究员针对39名近距离观看3D的观众做调查，有7人感到不适，表现症状为：呕吐、视力重影、以及眼疲劳等，有关数据发表在周刊《新科学家》上。虽然眼科专家称，该实验还需要深入，并研究3D技术对于人体“长期”的作用，然而这项技术导致人体在“短期内”不适已经是显而易见的了。

　　Viewers will have a choice between two types of 3D television types known as 'active' and 'passive', which show images in different ways. An 'active' television will cost less, but will require special 'shutter' glasses. The basic idea is that the TV displays the programme in a series of rapidly alternating frames - left eye, right eye, left eye, right eye - changing at such speed that the viewer cannot even detect it is happening.

　　如今，3D电视有两种，分“主动式”和“被动式”技术。主动式3D技术必须得搭配特制3D眼镜“shutter”方能观看，市场上该眼镜的售价为50英镑，眼镜自带电池。人们戴上眼镜才能享受3D效果，所以称之为主动式3D。

　　The passive technology relies on a special polarising filter on the TV set to split the image into its left eye/right eye components. The split picture is then viewed using a simple pair of polarising glasses - similar to the ones handed out in modern 3D cinemas - to create the 3D image.

　　相反，被动式技术无需特制3D眼镜，利用安装在电视上的“偏振光分束器”技术，自动分离图像。而观众只用配戴在电影院内分发的普通立体眼镜观看即可。

　　John Lee, President of The Royal College of Ophthalmologists, said in a recent interview: ‘You cannot damage your eyes by watching [in 3D], but if you spend an excessive period of time doing so, you may get a slight headache because of eye strain.’Experts do not recommend allowing children under eight to regularly use 3D glasses because their eye muscles are still developing.

　　专家警告，长时间观看3D电视有害健康，视疲劳明显。此外，专家不建议幼童（8岁下）观看，因为他们的眼部肌肉尚在发育过程中。