Well Avatar is a hit with just about everyone you ask raving about how good the movie is and how it is going to change how we watch them. The only problem is that there is a nasty side-effect to these 3D type movies.

Some people get really nasty headaches when they watch Avatar. Not just minor ones but the real down and dirty nasty types of headaches.

Mark Anderson at the ShadowLocked blog has a great explanation of why it happens for those that are curious but more important he also has a suggestion that will help alleviate or do away with the headaches that can come from watching 3D movies like Avatar. It all has to do with avoiding what is referred to as? the “circle of confusion” which is the ‘Don’t Look At This’ part in the image at the top of this post.

Checking out the ‘circle of confusion’ in Avatar is literally quite a headache, and counterintuitive to our enjoyment of the ‘baked and locked’ 3D planes that we are being presented with. Knowing that depth-of-field is all he has to play with if he’s not going to shoot rocks directly at us, Cameron doesn’t hold back – herelentlessly racks focus in scene after scene.

So the trick to avoiding a headache when watching this movie is to be obedient, and concentrate on the parts of the shot that the focus tells you are ‘important’. Once I understood this at the preview screenings last week, my headache began to clear up, but I was conscious too of the effort of having to ‘zip over’ to the next point of rapid-focus in order to keep up and preserve the 3D illusion.

【相關(guān)閱讀】

　　好萊塢3D巨制《阿凡達》自去年12月18日全球公映以來，已在歐美網(wǎng)絡(luò)上引發(fā)關(guān)于“Avatar h3dache（《阿凡達》3D暈眩癥）”的熱烈討論，國內(nèi)網(wǎng)友索性將其稱為“暈3菜”。

　　不過，“3D暈眩癥”的病原并非《阿凡達》，而是3D技術(shù)。事實上，此前的《冰川時代3》、《飛屋環(huán)游記》等3D長片都曾給觀眾帶來類似不適感，但由于其上座率不及《阿凡達》，因此引發(fā)的“病情”未能引起足夠關(guān)注。

　 　為何3D影片會導(dǎo)致暈眩？協(xié)和醫(yī)院眼科副教授曹陽解釋，3D電影除了大量實焦畫面外，還有豐富的虛焦布景畫面。在觀看3D電影的時候，畫面切換頻繁，觀 眾眼球須反復(fù)聚焦，導(dǎo)致眼睛睫狀肌過勞引發(fā)調(diào)節(jié)性視疲勞，從而產(chǎn)生眼睛酸脹、頭暈甚至惡心嘔吐等不適感?！坝懊栽谘劬Ρ容^疲勞的狀態(tài)下，不宜觀看3D影 片?！辈荜柼嵝?，觀影過程中，若感覺眼睛酸脹不適，應(yīng)取下專用眼鏡閉眼休息片刻，回家后可用溫熱毛巾局部熱敷眼睛，癥狀嚴重者則要及時就醫(yī)。