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[[File:Chromostereopsis.png|thumb|200px|Focal conflict due to [[chromostereopsis]]. Look at this image in full screen and feel the eye strain.]]
+[[File:VAC detail.png|thumb|200px|VAC as it can happen in virtual reality]]
A '''vergence-accommodation conflict''' is when a brain receives mismatching cues between eyes' [[focus]] and angle. It is disorienting and can result in eye and brain pain. The effect can be unpleasant and cause eye strain.
A '''vergence-accommodation conflict''' is when a brain receives mismatching cues between eyes' [[focus]] and angle. It is disorienting and can result in eye and brain pain. The effect can be unpleasant and cause eye strain.
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Focal conflict is difficult to overcome when designing new types of [[3D display]]s.<ref name=facebook /> Overcoming focal conflict requires the use of [[integral imaging]], or [[holographic display]]s or [[sequential lightfield display]]s.
Focal conflict is difficult to overcome when designing new types of [[3D display]]s.<ref name=facebook /> Overcoming focal conflict requires the use of [[integral imaging]], or [[holographic display]]s or [[sequential lightfield display]]s.
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+Companies including [[CREAL]] and [[VividQ]] have claimed to solve VAC.
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== Effects ==
== Effects ==