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Here, I describe why there is Eye Strain.

Jeremy Duncan

Standard Member
There is a principle of sound structure:
a.) You build the frame.
b.) Using the frame, you fill in the frame.

Frame sequential 3D shows the eyes two pictures, each time the eye has a focus.
That is, the eye see's the picture, then must move converge that eye to that picture.
So each time the new frame is shown to a new eye, that eye must converge that eye.

One frame of the source is 4 frames shown to the eyes; the eye-singular, must converge 2 different times.
Add in large convergence due to large parallax, and the eye must move a long way to converge, twice per source frame.

Add in ghosting and this adds more eye strain. But I want to point out that even with dlp you can get eye strain due to it using frame sequential 3D, and this meaning your moving the eyes like a iguana moves his eyes in two different directions.

With time parallel 3D, the picture is constantly shown to both eyes. So the eye isn't darting to converge all the time and this would means less spastic eye movement, and thus less eye strain.

Not only do the eyes move in different directions, spastically, but with desynchronization you may be moving the eyes to see two different pictures instead of the same picture.
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