Binocular Colour Vision

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Alternate Methods for Viewing the Bicovi Images.

This page presents two methods which can be used to fuse the appropriately created images.
The advantage of the Crossed Viewing Method shown in another page is its scalability; i.e. a six inch image viewed at two feet is the same as a six foot image viewed at twenty-four feet. However, it can result in eyestrain.

Parallel Viewing:- more relaxing for high-resolution small images but suffers from pixellation on resized screen images.

Mirror Viewing for the computer screen. This is included to present all possible viewing methods. In Practical Mirror Viewing, this method is scalable.

Test Images which can be used to try out the viewing methods.

Parallel Viewing

The image pair must be less than 5" wide by 2½" high (130 mm wide by 65 mm high). In the early stages of practice, 4" by 2" (100 mm by 50 mm) will be easier to work with.
In the Test Images that follow, the central square will appear to be closer to you than the large square and have a faint "X" in the centre.

Parallel Simple (5020 bytes)

Simple Parallel Viewing
This involves de-focusing the eyes as if you were looking through the computer screen to a distant object. In the early stages of practice, get very close to the screen and allow the eyes to relax. Multiple images will be seen. The two central images will fuse into one Bicovi image. (There will be two side images also visible.) Then you can move back from the screen to a convenient viewing distance allowing the eyes to maintain the focus. In time you will be able to de-focus directly from the convenient viewing distance.

Assisted Parallel Viewing
Get a piece of light cardboard or stiff paper approximately 12" long by 4" high (300 mm by 100 mm). Place one of the 4" edges against the screen in the middle of image pair. Put your nose near the opposite end and look down towards the screen. Allow the eyes to relax so you are looking through the screen. One image should be visible when the two images on the screen are fused.

Mirror Viewing for the Computer Screen

CAUTION:- only use a glass mirror if the edges are protected by plastic or thin wood. An unprotected edge may scratch you or the computer screen.

Get a mirror as large as convenient. The most useful mirror is the 6" by 4" (150 mm by 100 mm) acrylic type sold in stationery stores as Locker Mirrors. The acrylic plastic is too soft to scratch the computer screen. Select an image size of 6" wide by 3" high (150 mm by 75 mm) to start with. Experiment with the size to get one that works with your mirror.
In the Test Images the central square will appear to be shifted off-centre (with no 3-D effect).

Mirror Viewing

Hold the edge of the mirror between the images on the screen. Tilt the mirror towards the reflected image and position your head to be in line with the angle of the mirror. Look down the mirror (one eye on either side) to see the fused Bicovi image and one side image.

Test Images

If JavaScript (Active Script) is enabled, use the "Larger/Smaller" buttons on the image following to create a size appropriate for your viewing method. Alternately scroll down to select a suitable image size. (If there do not seem to be extra images, try Reloading the page.)

Bicovi Image

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