1. CROSSVIEW
Perhaps the most common is the crossview or cross-eye method where the image for the left eye is displayed on the right and the image for the right eye is displayed on the left.
ADVANTAGE
Large images can be viewed without the need for a viewer.
DISADVANTAGE
Going cross-eyed is a very unnatural way to look the world and can result in eye strain. And because each eye is viewing at an oblique angle the two images taper in opposite directions making it more of a strain for the eye-brain system to combine them.
2. PARALLEL
A more obvious method is to position the left image on the left and the right image on the right.
ADVANTAGE
A more natural way of viewing the world. Eyes are relaxed.
DISADVANTAGE
For most people (those unable to diverge their eyes) the separation of the images can be no greater than the separation of the eyes. This is around 6.5cm meaning that the images are very small and lack resolution.
3. PARALLEL with VIEWERS
My favoured method is to use a viewer (stereoscope). This enables me to view large images in a natural fashion with relaxed eyes.
ADVANTAGE
Large images can be viewed in a natural fashion without eye strain.
DISADVANTAGE
A stereoscope viewer is required.
3D viewers are not expensive. The ones I use cost around $30 or 30euro and can be purchased from
http://www.berezin.com/ in the USA or http://www.3dworldshop.com/ in Europe
